Hi, Since my Xeams server auto upgraded, some devices cannot e-mail anymore to the outside. After troubleshooting, I found these Ip's listed under "Intrusion Detection" marked as "Terminated due to timeout". Before the upgrade, there was no issue at all. The IP's are also whitelisted, but that doesn't help. Is there a workaround for this or do I need to look for a new MTA? Thanks for your suggestions! Kind regards, Tom