My Astaro box has 2 separate external IP's: x.x.x.132 is used for SMTP Auth Proxy and x.x.x.133 is used for VPN connections. x.x.x.132 is externally resolvable using the name smtp.mydomain.com, using that for outgoing mail server works great! However, once I connect to the vpn, I can no longer send mail. It can still resolve smtp.mydomain.com but it eventually times out with the following error:
Sending Message Failed.
The message could not be sent because connecting to smtp.mydomain.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your SMPT server setting is correct and try again, or else contact your netwok administrator.
Obviously I could change my server settings and send mail from the internal side once connected, but I have a number of users that are on and off the vpn all day. They do not want to have to change their server settings all the time. I realize that once connected to the VPN on IP x.x.x.133 I could not use that IP for sending mail, so I figured a second external IP would fix that problem....I stand corrected!
Any help or advise would be greatly appreciated. If you would like more config info just let me know and I will update this post ASAP.
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