Hey, what is bothering me a lot is that Greylisting is not working. That feature does help with Spam but it is not helpful when the mails arrive sometimes half-a-day or even 4 days later. Also when any mail goes through exactly that constellation of…

Hi Team, I need help to stop the SMTP open Relay on Sophos XG Firewal.. I have installed zimbra mail server and nated public ip through Sophos XG firewall and it is working but now some one using my smtp server to send emails as smtp open relay is…

As we followed Sophos document to config MTA mode, - Same domain transfer is ok. - Email send from LAN to WAN is ok - can't receive any inbound email from other domain (sender received email: 550 Relay access denied) Our Email server is under…