Fortimail delaying emails from Exchange

[Alpha7]

i have two exchange servers relay outbound messages through a fortimail box. it scans the antispam for inbound messages. If a mail received by Exchange A, It is relayed by fortimail without any issue. If message is received by Exchange B, delivery delayed by fortimail. I  have checked the Exchange B's queue, it was trying to relay number of spam messages. Genuine emails also delayed. How can i overcome this issue?

[emnoc]

I would go back to session limits personally. iInce it  effects one  server,  and only one, I would try to modify a a no session limit policy and apply that.

I would strip all profiles down to minimum and then retest and at the SAME TIME look at the  logs.  They might shed some clue as to what's happening.

[Alpha7]

I have already opened a support ticket and it is under investigation now

[Daedalus]

Hi Alpha7,

I was wondering if you got this issue resolved?

We are currently experiencing the same issue. FortiMail seems to be delaying outgoing mail (up to 3 min or something) before sending it out. 

[Alpha7]

Hi

Yes I resolved it. It is sender reputation. If you configure Fortimail using wizard, sender reputation is enabled for your mail servers as well. I would suggest to not to use the wizard and make sure sender reputation is not enabled on your outgoing session profile.

Thanks

[Daedalus]

Thanks for the answer.

It took me to the right direction. Sender Reputation was turned off in the session profile.  But IP reputation was turned on in the AntiSpam Profile (FortiGuard), i turned that off and the delay is gone.

Thanks!