Hi.
After extensive researching and talks with colleagues, I now resort to these forums.
I have a distribution group, which is allowed to receive e-mails from outside the organization, and most mailboxes sending to the address gives no problems. However when the DG receive e-mails from certain senders, the mail disappears, never to be found. I know this mail should come through, as sending it directly to a mailbox in the DG results in the mail being received instantly. I have tested rules in mailflow to make domain, IP, even specific words bypass the spam filtering, however nothing changes the fact that the mail won't come through when sent to the DG. I also checked my receive connectors, to ensure they were set to their default settings.
It seems to be a DG problem in general, as I have also tested with other DG's and the exact same happens.
Is there some sort of DG/DL spam filter I'm unable to find?
Kind Regards Fredrik