Rejected by Receiving Control in Mail_logs

[Slim.Jimmy]

Hi all,

One of the users where I work has been complaining about either not receiving mails or if they do turn up they arrive 12 - 36 hours later than when they were sent, these are all coming from a specific person only.

Just doing a general grep on mail_logs of the ironport C670 for messages sent by that person then on the MID shows:

To: xxx.yyy.com Rejected by Receiving Control

I was wondering if anyone has seen this message and actually knows what it is referring to, I can't seem to find much on it

Any help would be very much appreciated.

Many Thanks

[Tze Tai Mak]

Dear Damian,

The sending host (outgoing mail gateway of this external sender) probably falls into SUSPECTLIST or other sender groups of which the corresponding mail flow policy has defined 'max recipients per hour'. This sending host probably reaches the limit of maximum recipients per hour (note that we count by number of recipients, not number of messages) and IronPort starts to throttle (soft bounce) this sending host.

You can check whether the reputation of this sending host is poor from 'Message Tracking'. If you want to allow this host to send more emails to your domain, you can add this sending host IP or hostname into a new sender group and configure a new mail flow policy with higher number for "maximum recipients per hour". (Note: put this new sender group in the Host Access Table above BLACKLIST and SUSPECTLIST).

Cheers,

Tommy