Emails getting blocked? Take this one step to eliminate delivery issues.


GMass is a unique service in the email marketing space because it’s built on top of Gmail. That means, unlike a traditional email marketing service like MailChimp, GMass doesn’t have any email sending servers or sending IP addresses. All emails are sent from our users’ Gmail accounts and therefore through Gmail’s IP addresses. The benefit of this is that your emails are sent through the world’s highest deliverability servers, since virtually nobody blocks Gmail’s IP addresses.

This, however, doesn’t mean that our users are immune to getting blocked. If the content of your email is deemed spammy, then Gmail itself may block your account, or your recipients’ email servers may block your emails.

GMass doesn’t monitor its users

GMass intentionally doesn’t monitor its users. Meaning, accounts don’t need to be approved before you can start using GMass to send an email marketing campaign. Why don’t we police our users? Because Google does most of the policing for us. If you use GMass to send spam, it’s likely that Google’s automated systems will be triggered and your Gmail account will be terminated. It’s unlikely that we’d be able to develop a better algorithm than Google already has in place for detecting and terminating spammers.
However, even Google’s spam detection mechanisms might not be fast enough in some cases. Lots of spammers succeed in using GMass to send some spam out before Google notices and terminates the associated Gmail account.

Your emails could be blocked

Because of that, it’s possible for your legitimate emails to become associated with a spammer’s emails and for you to also get blocked. How are your emails connected to the spammer’s emails? If you’re using GMass’s open tracking, click tracking, or unsubscribe features, then a “tracking domain” is inserted into your email to allow those features to work. If you’re using open tracking, then an invisible pixel is placed at the bottom of your emails, and the domain referenced is the tracking domain. If you’re click tracking your links, the links are altered so that the GMass server is hit first to record the click, and that’s done by way of the tracking domain. Unless you’ve set up your own custom tracking domain, GMass uses shared tracking domains across accounts. Typical shared tracking domains look like or or They are variations of the word “gmass” with the vowels removed, using various Top Level Domain (TLD) extensions from .ag to .net to .com.

Some spam filters catalog domains that are commonly found in spammy messages, so if your emails contain the same tracking domain as the spammer’s emails, then your emails can also get blocked.

This screenshot shows an example of the role a tracking domain plays in your GMass sent emails. In this case, the tracking domain “” is used to track clicks of the reddit link.

The simple one-step solution

 The solution is a simple one. Your accounts should use a tracking domain that is specific to just your email campaigns.

If you are able to add a DNS record for your domain…

You can easily set up a branded tracking domain for your GMass accounts that is based on your OWN domain name.

If you can’t add a DNS record or this is too technical for you…

If you don’t know how to manage DNS records, register a new domain from scratch for use with GMass.

Regardless of whether you have a Gmail account or a Google Apps account, you can take advantage of this capability.

That is the single most important step you can take to maximize your deliverability and avoid blocking issues.

Re-sending your campaign to those that blocked you

 After a tracking domain has been set on your account, you may want to resend your campaign to anyone that blocked you previously. Here is how to do that.

39 Replies to “Emails getting blocked? Take this one step to eliminate delivery issues.”

    • Mickey Shelby

      stop my emails from sending i sent over 4000 emails and i cant stop them,and i keep get bounced messages in my inbox

  1. Jerzy

    What if I use an email address alias when sending GMass messages, i.e. I am log in in G Suite and GMass as, but send email as /on behalf of my other G Suite email address of, which is added in my G Suite settings as an alias. Which domain should be setup as my branded tracking domain for my GMass tracking, or

    • Maya Quijada

      Either one! It doesn’t matter which domain is on your Tracking Domain – what matters is that it’s your domain and is distinguished from all other GMass users. If you want consistency of domains, then I’d use the, since you’re sending with the alias of domain2.

  2. Kimberly Peers

    I sent a campaign to about 500 (batch sent 300 one day, remainder the next). Had scheduled a follow up for day 2. When followup started to run, they immediately came back “blocked”…the first 9. GMass attempted to send a total of 20. The next 11 came back as “bounce” from Google (not GMass) saying it was because I was “over my sending limit”. (Which I’m def. not.) I’ve had my Gmail account forever and probably could have even done the 500 at once if I’d wanted.

    I’ve been using GMass intermittently since it was first created years ago.

    I’m really concerned that MY email address has been blocked from sending to others. I can’t even send an individual email now. How do I find out the problem or what to do? I paid for the higher GMass plan. HELP!

  3. Amy Brooks

    I am in the same situation as Kimberly. I sent a campaign to under 400 emails and my GMail account has been basically shut down by GMail since. I paid for your services. I thought you worked well with GMail. At this point, you have shut down my business. Please help!!!!! It has been three days and I can’t send one email.

  4. jesikka

    I want full refund..and cancel my account gmass and gsuite and all…i try to much and nothing…only 40 mail daily..i don’t pay for 40 mail daily..sendgris is a bs..i want full refund

  5. Concerned

    I am concerned that it appears there are several people in these comments that are experiencing problems and not getting any response from Gmass? Why is this Gmass? Is Gmass monitoring this reply area? It appears to be abandoned?

  6. Susan

    I just tried this for the first time and all messages sent to agents in one particular company were blocked. I’m not going to be able to use this if I can’t figure out a way around it.

    • Marvin Quinsaat

      Hi Susan,

      You can eliminate this blocking issue by adding a custom tracking domain to your link tracking. The directions are found on this article.

      • jason higgins

        Hi Marvin

        I tried to add a custom tracking domain to my godaddy DNS CNAME page. Not sure if i have done it correctly.

        I read that if you add a custom tracking then this can help your sending ability.

        Please see the screen shot of my godaddy DNS page.

        Not sure if this is correct… domain name is

        I then added email to the front of it

        Then added to my godaddy DNS.

        Anyway this can be checked to see if i have done it correctly?

        thanks for your time Marvin

    • Marvin Quinsaat

      Hy My,

      Yes, if you’re experiencing delivery issues, it is highly recommended to add your own custom tracking domain as outlined in this article.

  7. Amr

    I bought g mass for Premium category and since yesterday I couldn’t send any emails and message mention that I had reached a limit for sending mail plz reply asap

    • Marvin Quinsaat

      Hi Amr,

      Although Google Apps accounts are officially limited to 2,000 emails per day, we have noticed over time that there are other factors that affect the send limits for an account. Age is a huge factor in this, as Google limit accounts to lower sending capacity until the account establishes its credibility. This is a measure to prevent scammers and spammers from opening accounts and sending at full capacity. 

      There’s some more information about these limits and factors here: ( )

      We recommend that in situations like yours, users ‘warm up’ their account by sending smaller campaigns over time to establish a reputation for the account and the domain. We don’t want your behaviors to flag Google’s spam detectors and cause bigger problems for you down the line. The more you use your G Suite to send and receive, the more it garners reputation and sets usage behavior resulting in slowly increasing Google imposed sending limits. 

  8. Chad

    If I am not using Gmass open tracking, click tracking, or unsubscribe features is there other benefit to setting up custom tracking domain?

  9. Jeff


    I sent an email to 20 recipients. There are some opens and clicks but it says 100% blocked?

    Total Recipients: 20 download
    Unique Opens: 7 (35%) download
    Didn’t Open: 13 (65%) download
    Unique Clicks: 1 (5%) download (Not all links are tracked)
    0 (%) download
    Blocks: 20 (100%) download (How to eliminate blocks)

    • Marvin Quinsaat

      Hi M,

      Tracking domains are reviewed manually so it does take a while for us to approve them. But once they have been approved, it will become active on your account in real-time.

Leave a Reply

Your email address will not be published. Required fields are marked *