Steps to remove your server IP address from Gmail blacklist

kumkumsharma

Administrator
Staff member
If you are getting below bounce back email while sending email to Gmail then it means your server’s ip address is in blacklist.

Example of 421 bounce back

Code:
421 4.7.0 [173.xxx.xxx.xx] Our system has detected that this message is suspicious due to the nature of the content and/or the links within. To best protect our users from spam, the message has been blocked. Please visit https://support.google.com/mail/answer/188131
for more information. u22si16671234pfl.244 – gsmtp
Example of 550 bounce back

SMTP error from remote mail server after end of data:

Code:
host gmail-smtp-in.l.google.com [192.xxx.xxx.xx]:
550-5.7.1 [193.XXX.XXX.125] Our system has detected an unusual rate of
550-5.7.1 unsolicited mail originating from your IP address. To protect our
550-5.7.1 users from spam, mail sent from your IP address has been blocked.
550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review
550 5.7.1 our Bulk Email Senders Guidelines. k8si8849879lbl.62
You first have to check your server for any spamming activity and stop that activity and then fill Gmail form to request for removal of IP address. You have to use this link (https://support.google.com/mail/con...n?rd=2&visit_id=637933747830977274-1216766986)

You will not get any response immediately so you have to wait 13-15 days.

Once you receive the bounce email mentioned above, you should take the precautionary actions we have discussed earlier. After that, fill out the bulk sender form of Gmail. It will ask for the name, email address, and bounce back email header. You won't get any response from google after submitting the form, so don't need to worry. Google may take 13-15 days to unblock the IP Address.
 
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