I\u2019m here to cut through the noise.<\/p>\n
These are the three ACTUAL techniques that outreach pros are using right now, in 2026, to send high-volume cold email campaigns<\/strong>.<\/p>\n I\u2019ve laid out the pros and cons for all of these \u2014 and share actual recommendations for new, intermediate, and expert cold emailers.<\/p>\n Inbox rotation has become the go-to technique for cold outreach over the past few years.<\/p>\n If you\u2019re unfamiliar with inbox rotation\u2026<\/p>\n Rather than sending a huge campaign from a single email address, your email sending platform distributes your campaign across multiple accounts<\/strong>. All responses are still handled in a unified inbox.<\/p>\n So instead of sending, say, 5,000 emails from one account, you could distribute 50 emails across 100 accounts.<\/p>\n Lower sending volume reduces the chances of an account getting flagged as spam<\/strong>\u00a0(plus, even if one does, the other accounts are still going strong). Plus with this technique, you can break Gmail\u2019s daily sending limits<\/strong>\u00a0as each sending account is well below that threshold.<\/p>\n We have inbox rotation here at GMass<\/a>, called MultiSend, and it\u2019s extremely popular with many of our cold emailers<\/strong>. It\u2019s offered at most of the other popular cold email platforms as well (at a higher price<\/a>, but you know).<\/p>\n Here are the main benefits of inbox rotation \u2014 and the reasons why it\u2019s become so popular.<\/p>\n There\u2019s a straight line between inbox rotation and a reduced risk of getting flagged as spam.<\/p>\n Instead of sending a high volume of (largely similar) emails from a single address, you distribute much lower volumes across a whole bunch of sequestered mailboxes.<\/p>\n So even if any individual mailbox gets hit with enough spam complaints to burn it \u2014 you still have plenty of other domains and mailboxes going strong. There\u2019s no \u201csingle point of failure\u201d here<\/strong>; you\u2019ve diversified your risk.<\/p>\n Elaborating on the point above\u2026 at lower volumes, you’re less likely to have Google, Microsoft, or other email providers shut you down for sending spam.<\/p>\n Sending mass emails from a single address can raise a red flag<\/strong>\u00a0and draw lots of attention, whereas lower volumes draw far less attention and are therefore less likely to get you noticed.<\/p>\n Plus, even if a domain or address gets burned, you can always drop it and bring in a new replacement<\/strong>.<\/p>\n It’s a lot easier to warm up a low-volume mailbox than a higher-volume mailbox.<\/p>\n You can warm up a mailbox to the point of reliability inboxing 20 or 30 emails in <\/strong>weeks<\/strong><\/em>\u00a0\u2014 or faster. And that\u2019s true even with a brand new domain.<\/p>\n With a single mailbox approach, it could take months to build up to significantly higher volumes.<\/p>\n Sure, platforms like Instantly limit your send volume, but when you have multiple mailboxes working concurrently, you can still get out large campaigns a lot faster<\/strong>.<\/p>\n That\u2019s especially true if you\u2019re throttling your outgoing speed<\/a>\u00a0to better simulate manual sending.<\/p>\n Adding minute-long pauses isn\u2019t a big slowdown between 30 emails; it\u2019s a much bigger drag between 10,000 emails.<\/p>\n Once you grasp the concept of inbox rotation (which most people pick up quickly) there’s not much technical complexity.<\/p>\n Yes, setting up domains, mailboxes, and authentication protocols involves some technical steps \u2014 I\u2019ll get to those momentarily.<\/p>\n But inbox rotation itself is a beginner-friendly way to send large campaigns<\/strong>.<\/p>\n When you send a high-volume campaign through SMTP, you’re no longer using Google\u2019s servers, which have higher deliverability than any other servers in the world.<\/p>\n With inbox rotation, since you’re distributing across multiple Gmail or Google Workspace addresses, you’re efficiently sending all your emails through Google’s high deliverability servers<\/strong>.<\/p>\n (Note: You may also send through Microsoft, a cold email infrastructure service, or a mix. Google is by far the best, though, when it comes to deliverability.)<\/p>\n That gives you an extra little boost<\/strong>\u00a0that other high-volume methods might not.<\/p>\n Another bonus? GMass\u2019s inbox rotation, unlike what you\u2019d find at places like Smartlead or Instantly<\/a>, uses the Gmail API rather than IMAP<\/strong>\u00a0for an even more reliable, higher-deliverability connection.<\/p>\n Though there are a lot of advantages to inbox rotation, which has made it the most popular technique of this moment in time \u2014 there are legitimate downsides too.<\/p>\n Forget your email sending platform\u2019s cost \u2014 that\u2019s table stakes.<\/p>\n The biggest cost for inbox rotation can come elsewhere.<\/p>\n Every guru and everyone you encounter on the boards will tell you\u2026<\/p>\n Once you add up those costs, inbox rotation can quickly add up to hundreds of dollars before you even get started<\/strong>.<\/p>\n That\u2019s a significant<\/em>\u00a0up-front outlay, especially for new cold emailers who don\u2019t even know if this channel is going to work for them.<\/p>\n In fact, the startup costs have gotten so<\/em>\u00a0crazy that a new sub-industry has sprung up. There are around a dozen cold email infrastructure services<\/a>\u00a0now that run their own servers and enable faster domain, mailbox, and authentication setup.<\/p>\n While those are<\/em>\u00a0cheaper than $6-a-pop mailboxes, they are still relatively expensive (you\u2019re usually looking at $150+ per month). Plus the deliverability you\u2019ll get through those services<\/a>\u00a0is still a big matter of debate.<\/p>\n While the various email sending platforms have figured out faster methods for adding domains and mailboxes into their systems, setting up authentication protocols like <\/strong>SPF<\/a><\/strong>, <\/strong>DKIM<\/a><\/strong>, and <\/strong>DMARC<\/a><\/strong>\u00a0for every domain is still time-consuming and unavoidable<\/strong>.<\/p>\n For newer cold emailers and those who don\u2019t know DNS well, there\u2019s a chance for mistakes that can lead to even more <\/em>wasted hours.<\/p>\n And that\u2019s not all.<\/p>\n Each mailbox and domain needs warm up time<\/strong>\u00a0\u2014 the gurus and message board experts say weeks and weeks \u2014 before you can start sending campaigns.<\/p>\n This is a significant amount of time before you can get started and use your expensive investment. It\u2019s especially discouraging for new cold emailers.<\/p>\n Plus, if you use the automated warm-up tools out there, it\u2019s quite possible you\u2019re doing more harm than good to your deliverability.<\/p>\n Setup takes time\u2026 but it’s not the only time-sucking part of the inbox rotation process.<\/p>\n There\u2019s ongoing, neverending management of your domains and mailboxes<\/strong>.<\/p>\n That includes checking for drops in deliverability, replacing burned mailboxes and domains, checking for disconnected domains (this happens a ton<\/em>\u00a0on Instantly), and a never-ending cycle of purchasing and warming up new domains and mailboxes.<\/p>\n For high-volume senders, this can turn cold email setup<\/em>\u00a0into a full-time job. And shouldn\u2019t you be spending your time actually using cold email to sell?<\/p>\n Inbox rotation works right now, in 2026.<\/p>\n However, this is a clear example of a short-term tactic and not a sustainable long-term strategy<\/strong>.<\/p>\n At any point, Google and Microsoft could get wise to what’s going on and decide to stop treating all your different mailboxes as different entities.<\/p>\n In fact, we suspect they already know<\/strong>, but thus far they haven\u2019t felt the need to shut this all down.<\/p>\n We cold emailers think<\/em>\u00a0we’re outsmarting them, but they’re way smarter and way more advanced than any of us could be.<\/p>\n So consider inbox rotation a tactic that, perhaps one day, is going to stop working. And when it does, you have to be sure that you’re not left with your pants down<\/strong>\u00a0because this is the only way you know how to run your outreach operation.<\/p>\n As cold email has grown in popularity \u2014 and deliverability has endured as a challenge \u2014 the top email platforms have been looking for ways to evolve.<\/p>\n ColdSMTP<\/a>\u00a0is the biggest innovation to date.<\/p>\n ColdSMTP is the world\u2019s first sending server specifically built and designed for cold email<\/strong>.<\/p>\n So rather than sending through services that are unfriendly<\/em>\u00a0to cold email \u2014 like Google, Microsoft, and SMTP providers \u2014 you\u2019re sending through a server that\u2019s exclusively <\/strong>for<\/strong><\/em>\u00a0cold email<\/strong>.<\/p>\n And thanks to the \u201ctop 1% of the top 1%\u201d expertise of the developers of ColdSMTP, the server has exceptionally high deliverability rates \u2014 which is unprecedented for cold email<\/strong>.<\/p>\n ColdSMTP is available to top cold emailers by application only<\/a>.<\/p>\n There are a whole lot of benefits\u2026<\/p>\n With inbox rotation, setting up multiple domain names, individual mailboxes, and authentication protocols takes a whole lot of time.<\/p>\n With ColdSMTP, you only need to set up a single mailbox.<\/strong><\/p>\n This can save you dozens of hours during the startup process \u2014 and lots more time down the road as you won\u2019t need to monitor accounts and create endless new ones.<\/p>\n Instead of buying multiple domain names then mailboxes at $6 each, investing in a cold email infrastructure service, or paying for multiple SMTP servers, the cost with ColdSMTP is simple.<\/p>\n You\u2019ll need a GMass plan \u2014 which are less expensive than other cold email platforms\u2019 plans \u2014 and then it\u2019s $99\/month for ColdSMTP.<\/p>\n This is a fraction of the cost<\/strong>\u00a0of any other setup for sending high-volume emails.<\/p>\n While deliverability largely comes down to you<\/em>\u00a0and your reputation\u00a0(don\u2019t believe anyone<\/em>\u00a0who says otherwise), your sending platform and infrastructure are making a contribution.<\/p>\n They can also hurt<\/em>\u00a0you and hinder your chances of maximizing your deliverability.<\/p>\n ColdSMTP is\u00a0unique in that it\u2019s a cold email sending server which was built, cultivated, and maintained to provide the best deliverability possible<\/strong>.<\/p>\n Again, if you\u2019re sending spam, there\u2019s nothing any<\/em>\u00a0server can do for you. But if you\u2019re doing your part by\u00a0sending targeted emails to a well-researched list, ColdSMTP will do its part and get you into the inbox<\/strong>.<\/p>\n With inbox rotation, costs rise as you send more emails.<\/p>\n You need more domains and more mailboxes. You might decide to pay hundreds of dollars a month for an infrastructure service. And many platforms, like Instantly, limit your monthly sending volume unless you pay for higher-tier plans.<\/p>\n With ColdSMTP, you can send unlimited emails for the $99\/month fee<\/strong>. There’s no need to buy new domains or mailboxes.<\/p>\n That gives you a fixed, cost-effective structure that’s magnitudes of order below what you\u2019ll pay for similar volumes elsewhere.<\/p>\n The ColdSMTP server is already warmed up<\/strong>, so you don’t need to spend weeks or months on the process.<\/p>\n While a new domain and mailbox do require some warm-up, it’s a much<\/em>\u00a0shorter window. \u00a0Plus, you can skip the self-sabotaging automated warm-up systems.<\/p>\n Instead of waiting a month to start, with ColdSMTP, you can send your email campaigns on day one.<\/strong><\/p>\n Even though you\u2019ll send through your Gmail account when you use ColdSMTP, your emails are not going through Google\u2019s sending servers. They\u2019re going through ColdSMTP\u2019s server.<\/p>\n Which means: Google won\u2019t shut down or flag your account, because you aren\u2019t sending through their servers<\/strong>.<\/p>\n That\u2019s one of the reasons you can use a single mailbox here rather than the dozens you\u2019d use with inbox rotation.<\/p>\n While techniques like inbox rotation and cold email infrastructure setups are short-term, somewhat hack-y workarounds, SMTP servers are a sustainable strategy.<\/p>\n Even if Google and Microsoft one day shut down cold emails going through their systems, SMTP servers will be the go-to.<\/p>\n By learning to use a SMTP-based strategy, you’re building a robust, future-proof foundation for your business<\/strong>.<\/p>\n Yes, believe it or not, there are<\/em>\u00a0some downsides to ColdSMTP. Though the biggest one is a social one.<\/p>\n When ColdSMTP launched, I paid close attention to any negative comments on Reddit, LinkedIn, and Facebook groups.<\/p>\n And by far, the biggest objection was skepticism.<\/p>\n Why? Because ColdSMTP contradicts the \u201claws\u201d of cold email that gurus and cold email bro platforms have pushed \u2014 and many people have internalized.<\/p>\n Yes, the gurus say you can\u2019t send from a single address. They say you need lots of domains, lots of mailboxes, and automated warm-up.<\/p>\n That works for them<\/em>. (Or, more accurately, they have a financial stake in people following their advice.) But it\u2019s not the only way. <\/strong><\/p>\n So if you can keep an open mind and give it a shot, you\u2019ll see this <\/strong>is<\/strong><\/em>\u00a0an actual solution to so many of cold emailers\u2019 major pain points<\/strong>.<\/p>\n To maintain high server standards \u2014 and keep deliverability up \u2014 only proven cold emailers can send using ColdSMTP<\/strong>.<\/p>\n Emailers have to demonstrate evidence of strong open and reply rates \u2014 either on GMass or another platform \u2014 to gain access to ColdSMTP.<\/p>\n So if you\u2019re brand new to cold email \u2014 or the campaigns you send are much closer to spam than actual cold email \u2014 this solution probably won\u2019t work out for you right now.<\/p>\n While ColdSMTP is a high-deliverability server designed for top cold emailers\u2026 it’s not Google’s server.<\/p>\n It\u2019s always great to send through Google’s servers due to their reputation for high deliverability.<\/p>\n ColdSMTP is also extremely strong, but if you\u2019re hesitant, it\u2019s best to see for yourself the difference between sending through Google and sending through this specialized SMTP server<\/strong>.<\/p>\n Before inbox rotation and long before ColdSMTP, there was really only one way to break Gmail\u2019s limits and send 10,000+ emails-per-day: Using SMTP servers<\/a>. And that method still works today.<\/p>\n You get an account at a third-party SMTP provider, like SendGrid. Then you connect that to your email sending platform and route your high-volume campaigns through that server<\/strong>.<\/p>\n It\u2019s also possible to set up multiple SMTP servers<\/a>\u00a0\u2014 or, if you\u2019re extremely technical, you could even build your own.<\/p>\n Here are the benefits of using SMTP servers for sending, especially when compared to inbox rotation.<\/p>\n Since emails are sent from a single address, you don’t need to spend forever setting up and managing multiple domains and mailboxes<\/strong>.<\/p>\n You just configure your SMTP servers, connect them to your sending platform, and you\u2019re all set up.<\/p>\n It\u2019s definitely less expensive to send through SMTP servers<\/strong>\u00a0than to purchase a bunch of domains and mailboxes.<\/p>\n For instance, you can send 100,000 emails\/month through SendGrid for $35.<\/p>\n Across a few servers, you\u2019ll probably spend around what you\u2019d spend on ColdSMTP \u2014 both far below the inbox rotation cost.<\/p>\n Using SMTP servers, especially multiple ones, allows you to fine-tune your email sending process<\/strong>.<\/p>\n For instance, if you’re having trouble sending to Microsoft addresses from one server, you can send using a different server entirely (check out the delivery routes<\/a>\u00a0feature to do this easily). Or if you\u2019re finding one SMTP server has plummeting delivery rates, you can turn it off and use others.<\/p>\n There are strong reasons why cold email sending platforms have been figuring out alternatives to using SMTP servers<\/strong>\u00a0for high-volume campaigns.<\/p>\n Here are the flaws with using SMTP servers in your mass outreach campaigns.<\/p>\n Relying heavily on one or even multiple SMTP servers can be risky.<\/p>\n After all, you\u2019re sending high volumes from a single email address, often on one or just a small handful of servers. Your spam complaints won\u2019t be diversified around multiple email addresses<\/strong>\u00a0like they are with inbox rotation.<\/p>\n And unlike ColdSMTP, the SMTP servers you\u2019re using in this method are not<\/em>\u00a0optimized for or even welcoming of cold email.<\/p>\n Which means: If your SMTP providers find you’re getting too many spam complaints, they will shut you down \u2014 jeopardizing your entire setup.<\/p>\n Deliverability can be unpredictable<\/strong>\u00a0when you\u2019re sending outreach campaigns over SMTP.<\/p>\n Even if you manage to get your server warmed up for your volume, you’re likely not a deliverability expert \u2014 and\/or don\u2019t have time it takes to monitor and tune your setup.<\/p>\n This makes deliverability uncertain. Between the three options on this list, sending via third-party SMTP servers gives you the fewest deliverability benefits<\/strong>.<\/p>\n Warming up a SMTP server can take a <\/strong>very<\/strong><\/em>\u00a0long time<\/strong>.<\/p>\n Since you’re trying to send high-volume outreach campaigns, you need to warm up your server to be ready to handle thousands of messages a day.<\/p>\n It’s not impossible \u2014 but it can be much<\/em>\u00a0more of a process than a small warmup for each mailbox in inbox rotation, or the minimal or zero warmup required by ColdSMTP.<\/p>\n SMTP providers, by and large, don’t want people using their services for cold outreach.<\/p>\n SMTP providers tend to be a bit less magnanimous toward cold emailers<\/strong>\u00a0than even Google and Microsoft.<\/p>\n That means they likely won\u2019t give you the benefit of the doubt<\/strong>; if they find you\u2019re sending cold emails that aren\u2019t getting great engagement and are getting a decent volume of spam reports, they have no problem terminating your service.<\/p>\n I’ve been on multiple calls with emailers where I’ve just said the acronym SMTP and seen a look of terror appear on the person’s face.<\/p>\n While SMTP isn\u2019t particularly challenging to someone who\u2019s technically-minded \u2014 there are plenty of salespeople who aren\u2019t. They just want to send emails, not get into tweaking server configurations or learning about how to handle Mimecast blocks<\/a>.<\/p>\n Which is why if you\u2019re a less technical user, you may find the other options are more ready \u201coff-the-shelf.\u201d<\/strong><\/p>\n With all that info, here are my recommendations for which of these high-volume sending options is best for you.<\/p>\n I know I laid out a strong case against inbox rotation \u2014 but I still recommend that new or inexperienced cold emailers use this as your method for large campaigns.<\/p>\n As you learn how to use mailboxes, set up domains, authentication protocols, and monitor email client responses, you’ll gain valuable knowledge you need<\/strong>\u00a0to succeed long-term.<\/p>\n BUT\u2026 please don\u2019t spend hundreds of dollars when you\u2019re getting started.<\/p>\n Start small with a few domains and mailboxes. Warm them up (manually, please<\/em>, don\u2019t kill them before you\u2019ve even started with automated warm-up). Don\u2019t pay for a cold email infrastructure service.<\/p>\n Use inbox rotation, refine your cold email templates and techniques<\/strong>\u00a0\u2014 then<\/em>\u00a0invest in growing your empire.<\/p>\n At GMass, we\u2019ve tried to make the inbox rotation setup process<\/a>\u00a0as fast as we can.<\/p>\n You connect your mailboxes to GMass, either in the dashboard or in the campaign settings box.<\/p>\n By using oAuth, the connection is faster and much more reliable than the connection process at other platforms.<\/p>\n Then, for each campaign, you can choose which mailboxes you want to use for sending and set an optional volume to send from each of those mailboxes.<\/p>\n All the responses come to a unified inbox, and using GMass\u2019s Reply Project<\/a>, you can send responses to those replies at record speed.<\/p>\n GMass\u2019s MultiSend is the most beginner-friendly inbox rotation system on the planet<\/strong>\u00a0\u2014 but also powerful enough for outreach pros as well.<\/p>\n If you want to check it out, sign up for a free trial of GMass<\/a>. You can test out MultiSend and see how it works<\/strong>\u00a0before you subscribe to a paid plan<\/a>.<\/p>\n If you\u2019ve built up a solid track record in cold email, I strongly recommend applying for ColdSMTP<\/a>.<\/p>\n After all, you\u2019ll save a ton of money and time<\/strong>. It\u2019s so much easier<\/strong>\u00a0to use than inbox rotation. And that<\/em>\u00a0will give you the opportunity to spend much less time focusing on your setup and much more time on sending even better campaigns.<\/p>\n If, after applying<\/a>, you don\u2019t get on to ColdSMTP, I recommend sticking with inbox rotation and continuing to strengthen your portfolio.<\/p>\n Right now, ColdSMTP by GMass is the only cold email sending server on the market.<\/p>\n Why? A server like this is too challenging to build and maintain, so only GMass \u2014 which pioneered cold email through Gmail a decade ago \u2014 had the expertise to do it.<\/p>\n I\u2019ll update this article if anyone else ever makes one but, odds are, no one will.<\/p>\n As I\u2019ve mentioned before, ColdSMTP is available by application only.<\/strong>\u00a0You can fill out the form here<\/a>\u00a0and the deliverability team will let you know if you\u2019re approved or if they need more info from you.<\/p>\n As an advanced cold emailer, it\u2019s time to start diversifying your setup \u2014 and working your way off inbox rotation.<\/p>\n You should definitely give ColdSMTP a try<\/strong>\u00a0\u2014 it will cut your costs, and you\u2019ll have the experience to tell if it\u2019s working as well as your other systems.<\/p>\n But I also recommend trying out some other SMTP services, as you can tweak those servers to your exact liking<\/strong>. And ultimately, you may even want to look into building your own sending server where you\u2019re in total control.<\/p>\n The good news: If you want to use third-party SMTP servers, it\u2019s easy to use them with GMass.<\/p>\n (The combo of GMass + SendGrid<\/a>\u00a0or other servers also works a whole lot better than trying to send campaigns at those SMTP providers themselves.)<\/p>\n With GMass, you can connect <\/strong>multiple SMTP servers<\/a><\/strong>\u00a0to your account<\/strong>. Then you can choose which server to use for different campaigns.<\/p>\nTable of Contents<\/h2>\n
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The Most Popular Method: Inbox Rotation<\/h2>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2023\/09\/image10.png\")
<\/a><\/p>\nThe benefits of using inbox rotation for cold email<\/h3>\n
Reduces spam risk<\/h4>\n
Reduces the risk of the email providers shutting you down<\/h4>\n
Easier warm-up<\/h4>\n
Quickly send out high volumes<\/h4>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2017\/03\/newfeatures-longerpause-tinified.png\")
<\/a><\/p>\nNot too<\/em>\u00a0technically complex<\/h4>\n
Allows for sending through Google\u2019s servers<\/h4>\n
The downsides of using inbox rotation for cold email<\/h3>\n
The price adds up remarkably<\/em>\u00a0fast<\/h4>\n
\n
Setup takes hours, if not days (not including warm-up)<\/h4>\n
Managing domains\/mailboxes is a lot of ongoing work<\/h4>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2023\/10\/image12.png\")
<\/a><\/p>\nIt\u2019s a tactic, not a long-term strategy<\/h4>\n
The Best New Method: ColdSMTP, a Sending Server Specifically for Cold Email<\/h2>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2024\/12\/phslide1-promotional.png\")
<\/a><\/p>\nThe benefits of using a cold email SMTP server<\/h3>\n
Saves a ton of setup time<\/h4>\n
Saves a ton of costs<\/h4>\n
Excellent deliverability<\/h4>\n
Send unlimited emails without costs going up<\/h4>\n
Reduces warm-up time significantly<\/h4>\n
Reduces the risk of getting shut down by Google<\/h4>\n
A long-term solution, not a short-term tactic<\/h4>\n
The downsides of using a cold email SMTP server<\/h3>\n
Runs contrary to what the masses tell you is the Only Way To Do Things<\/h4>\n
![\"Skepticism](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2025\/02\/highvolmethod-skepticism.png\")
<\/a><\/figure>\nRequires a track record of sending quality cold emails<\/h4>\n
Doesn\u2019t use Google\u2019s servers<\/h4>\n
The Classic Method: Sending Through a Single, or Multiple, SMTP Servers<\/h2>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2024\/11\/multiplesmtp-addserversettings.png\")
<\/a><\/p>\nThe benefits of sending through third-party SMTP servers<\/h3>\n
Saves time compared to inbox rotation<\/h4>\n
Reduces cost compared to inbox rotation<\/h4>\n
Gives you more control of the sending process<\/h4>\n
The downsides of using SMTP servers<\/h3>\n
There\u2019s a high failure risk<\/h4>\n
Deliverability is iffy<\/h4>\n
Warm-up can be a longer process<\/h4>\n
The SMTP providers don\u2019t love cold email<\/h4>\n
Can feel extremely technical<\/h4>\n
Recommendations for Which Option You Should Use<\/h2>\n
Recommendation for brand new cold emailers: Inbox rotation<\/h3>\n
How to set up inbox rotation<\/h4>\n
![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2023\/09\/image13.png\")
<\/a><\/p>\n![\"\"](\"https:\/\/www.gmass.co\/blog\/wp-content\/uploads\/2023\/09\/image16.png\")
<\/a><\/p>\nRecommendation for intermediate cold emailers: ColdSMTP<\/h3>\n
How to get started using a cold email sending server<\/h4>\n
Recommendation for advanced cold emailers: ColdSMTP and SMTP servers<\/h3>\n
How to set up SMTP servers in GMass<\/h4>\n