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1. What's your daily volume per mailbox? 2. What is the age of each mailbox? 3. What is the frequency between each email sent? 4. Can you send me a line graph of your sending volume ( X= day of week, Y = emails sent) In short, i personally don't think Google is doing anything in particular to restrict outbound emails. They are tightening things around what they classify as spam which isn't that detrimental if you have a good process. What they are doing, however, is clamping down on API based warmup tools and possibly will Target SMTP based ones too since it actually does violate their TOS

That's a great framework to assess, Soham! We actually checked all of that for internal RCA. Our volumes are under 300 mails per week for this mailbox 3 months old. Frequency between mails is at least 2 days. For your last paragraph, what is your advice to make it work with Gmail?

300 emails/week is fine. You're facing issues in other areas in that case. A few things to note 1. Try to keep a steady volume daily. Don't just send 50 emails one day and then nothing for 2 days i e don't let the curve touch x=0 on sends 2. Only send to valid emails that are verified by neverbounce/zerobounce. Bounce rates over 3% = massive issues 3. Have you setup proper SPF, DKIM, DMARC? What's your DMARC policy set to? 4. Go to mail-tester and check your email score, it even gives you the blacklists you're on 5. Use MXtoolbox to diagnose your IP

Thanks Soham! Gonna take that advice!

Hey @Soham Sarkar what to do if you are blacklisted in some of the lists?