Office 365 flagging everything as junk

Steve Kemp

• February 21, 2019 19:11

We have noticed that user on all of our servers in various locations and datacentres who send mail to an office 365 account in the past week have started seeing that they are either not delivering with no bounce message or are getting delivered to Junk we have checked over 30 RBL lists and none of our IP's are listed and its never been a problem previously. even clients with Office 365 who whitelist a particular domain or IP of ours are having the same issue still has anyone else seen this issue in recent weeks or know of a solution ? Our PTR's DKIM and DMARC are all correct on each server and all site on the servers send thru the shared IP as the server hostname

• 

  keat63

  • February 22, 2019 13:19

  I had an issue recently where my IP was blacklisted on outlook.com. No other servers only MS, and no idea why, as it's a small corporate server with only about 15 users, and a zero spam policy. I logged a ticket with MS.

  0
• 

  cPanelLauren

  • February 22, 2019 20:13

  Unfortunately, in cases like this, it's really up to the discretion of the provider in cases like this. Microsoft uses it's own systems to flag mail/IP's as potential spam and as long as you're ensuring that you're taking the normal, necessary precautions: Valid:

  • SPF
  • DKIM
  • rDNS
  • No Blacklists/Good IP reputation

  You'd need to contact them for information

  0

Please sign in to leave a comment.