Gmail blocking all messages

1

Hi all,

We’re deploying a new axigen server. We’ve tested to send mails from different hosts/servers and to differents hosts/servers and all works correctly, but when we send mails to Gmail we receive the following error:
Message send failed (552 Mail rejected by the processing module: 5.7.28 [40.85.127.156 1] Our system has detected an unusual rate of 5.7.28 unsolicited mail originating from your IP address. To protect our 5.7.28 users from spam, mail sent from your IP address has been blocked. 5.7.28 Please visit 5.7.28 https://support.google.com/mail/?p=UnsolicitedIPError to review our 5.7.28 Bulk Email Senders Guidelines. c14si5306690wrb.513 - gsmtp)

Do you know what’s causing it? Our SPF are correct.

Thank you,
Regards.

2

GMAIL (and Outlook too) requires also the DMARC and DKIM records.
Did you configured the records properly?

3

Before you start to use a new IP first you need to check the blacklists

Second you need to warm up your IP.
Then you need to set DNS records:
RDNS, MX, SPF, DKIM and DMARC.

Finally you can send a request to gmail postmaster and request for deliver your emails to mailboxes.