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Introducing our free email warm-up tool

GMass email warm up tool

You can now warm-up any Gmail or G Suite email address for free. Email warm-up has been a hot topic in the cold email community recently.

Warming up a new e-mail address, and especially a new domain, is important in order to:

  1. Be able to send your full limits, based on Google’s policy of 500/day for Gmail accounts and 2,000/day for Google Workspace (formerly known as G Suite) accounts.
  2. To get the best possible deliverability to the Inbox.
  3. Minimize the chance that Google suspends your account, especially if you have a new Gmail account or new Google Workspace domain with no sending history.

An automated email warm-up system does the following:

  • sends emails from your account to other email accounts and vice-versa
  • examines where those emails land, marks them as “not spam” if they end up in Spam
  • marks them as “read”, and replies to them as well

Warm-up works by training Google’s algorithms to see that emails coming from your email account are desirable and highly engaging.

Several email warm-up services like Lemwarm and Mailwarm already exist, but I found flaws and room for improvement in these systems, and so our development team got to work. We believe our warm-up system is the best one on the market. GMass’s automated warm-up system is an improvement over others because of the following:

  1. One-click setup: Making setup a matter of just one click. No usernames/passwords to enter, no security settings to alter. Because our system works over OAuth, not by logging in.
  2. Auto-detect the right settings: GMass auto detects what your daily volume and ramp-up should be by automatically analyzing your account’s sending patterns.
  3. Multi-message threads: GMass’s warm-up conversations include several back-and-forth replies as opposed to just one reply, making the email thread seem more natural.
  4. Auto Inbox decluttering: No need to set up a Gmail filter manually (in fact, doing so harms the warm-up process). Our system will automatically archive the warm-up emails sent to your Inbox.
  5. It’s completely free to the public.

How do you warm up an account?

There are two ways to start the warm-up process on your account.

1. From the web

Even if you don’t have a GMass account yet, go here to warm up any Gmail account.

2. Using the Chrome extension

If you have the GMass Chrome extension installed, then just do this:

Start warm-up on your account using the GMass button.

Note that alias addresses don’t need warming up — it’s just the primary Google account that you’re logged into that will be warmed up. Any aliases tied to that Google account should inherit the same warm-up “sauce” as the primary account.

You’ll receive an email confirmation once warm-up has begun.

What does an account that’s warming up look like?

When our software warms up an email account, it sends emails from and to that account to simulate conversations. The text of the conversations is auto-generated by a sentence-generating algorithm. It often reads like gibberish but is still in the form of complete sentences. Here’s an example of what a new Google Workspace account that is being warmed up will look like.

The SENT folder of an account that’s in the process of being warmed up.

Note that every email sent as part of the warm-up process has the tag [GWarm] at the end of the subject line. That’s so our systems can easily identify these emails in your account so we can determine where they’re landing (Inbox, Spam, Promotions, or other folders) and so we can automatically archive them from the recipients’ Inbox to prevent Inbox clutter.

What exactly does warm-up accomplish?

When you set up a new Gmail account, you can’t immediately send the full 500 emails/day that Google states is allowed. That’s for good reason. If Google allowed every new Gmail account to send its full limits, then spammers would be setting up gmail.com accounts all day long. Instead, reputation needs to build over time, and that’s done is by sending slowly from the account, ramping up daily volume over time and making sure emails are read and replied to, and that’s what an automated warm-up solution does.

How many emails will be sent?

When warm-up is first activated, the system analyzes your past sending volume to determine the optimal starting volume/day and the optimal number by which to increase volume every day. For a new account with no sending history, the system will start by sending 2 emails/day and will increase that amount by 2 more emails every day. A schedule might look like this:

Day 1: 2 emails/day

Day 2: 4 emails/day

Day 3: 6 emails/day

Day 4: 8 emails/day

…until you achieve 200 emails/day, at which point warm-up will be automatically turned off.

Every email that is sent is marked as “read” by the receiver. Some of the emails will also be responded to.

Additionally, if your emails aren’t landing in the Inbox, this system can help with that. By sending emails that are automatically engaged with, you’re training Google to increase your domain’s reputation, which should result in better deliverability.

Switching from a different warm up service to GMass is ridiculously easy

If you’ve been using another warm-up service that you’re paying for, switching to GMass’s free warmup system is easy and can be accomplished with a couple clicks. Because GMass analyzes your sending patterns to determine the optimal volume and ramp-up settings, you won’t lose any time by switching to GMass. For example, let’s say you’ve been using Lemwarm, and you started at 2 emails/day and have now ramped up to 40 emails/day over the last 14 days. GMass will detect this volume and set your starting volume near 40 emails/day. Of course, you can always adjust the settings if you don’t like what our algorithm picks for you.

We’ve made switching warm-up systems as easy as cancelling your other service and activating the GMass system. No complex math required.

To what addresses will warm-up emails be sent?

When you activate warm-up on your account, emails will be sent from and to your account. The other addresses with which you’ll correspond consist of other GMass users who are also warming up their accounts and additional seed accounts that we maintain internally.

How do I check my results?

We’re working on building the results of your warm-up into the GMass Dashboard. Soon you’ll be able to see graphs and tables showing how warm-up is changing your Inbox placement over time.

Don’t set up a filter!

Once your account starts to send and receive warm-up emails, you may see emails tagged with “GWarm” in the subject line in your Inbox. They will only remain there for a few minutes before they’re auto archived. Other email warmup systems encourage users to set up a Gmail filter to prevent warm-up emails from flooding your Inbox, but in actuality, this is a terrible practice. If you set a filter to move warm-up emails immediately from the Inbox to another label, or to auto archive them, then this prevents Gmail from “learning” that these emails belong in the Inbox rather than the Spam, Promotions, or Updates folders. Please do not set up a filter, because if you do, you’ll reduce the effectiveness of warm-up for other users. After the email has remained in your Inbox for about 30 minutes, GMass will automatically archive the message for you.

Can I warm-up an Office 365 email address?

For now, our service only works with Gmail and Google Workspace (formerly known as G Suite) accounts.

  1. Hello! Such situation. If I inadvertently sent a mailing list to 3 mailboxes and received a mailbox ban, but after 10 minutes I successfully restored it and started a test mailing according to the instructions, can I not worry about the mailbox? Or is it better to create a new one and do everything right from the beginning?

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