Four days ago emails sent to our Gmail accounts via our ISP's mail servies started being rejected due to not being RFC 2822 complainant.
The following message to was undeliverable. The reason for the problem:
5.3.0 - Other mail system problem 550-'5.7.1 [2001:44b8:8060:ff02:300:1:6:6 11] Our system has detected that\n5.7.1 this message is not RFC 2822 compliant. To reduce the amount of spam\n5.7.1 sent to Gmail, this message has been blocked. Please review\n5.7.1 RFC 2822 specifications for more information.
iw4si27447595pac.153 - gsmtp'
It’s frustrating because these emails have been working fine for over a year—I'm assuming Google has upped their filters in the last week.
The email address we are trying to send to belongs to our Google Apps for Business account. I'm wondering, is there a way to override the RFC 2822 compliance filter to allow the emails to come through?
So far, adding the ISPs domain name to the spam whitelist in Gmail settings (in the Apps control panel) hasn’t worked.
The telnet log for the rejected message in question is:
220-ipmail06.adl6.xxxxx.net ESMTP 220 ESMTP; eth2958.xxx.adsl.OurISP.net [150.xxx.xxx.xx1] in MTA HELO WINDOWS-xxxxx (<- this is our server name) 250 ipmail06.adl6.OurISP.net MAIL FROM: account@OurISP.net 250 sender ok RCPT TO: firstname.lastname@example.org 250 recipient ok RCPT TO: admin@DifferentGoogleAppsDomain.com 250 recipient ok DATA 354 go ahead Subject: Test email from the Avid ISIS Notification Application This message was generated by Avid ISIS Notification Application. . QUIT 250 ok: Message 716893804 accepted