Outgoing Mail on Subdomain on a different server

[Shawn Britton]

Not sure if this is the right place to ask, but I'm running into an issue with outbound mail. Here is my setup:

http://www.mydomain.com (Server A running gosh knows where...likely some shared server on a cheap host that I have little control of)

http://stuff.mydomain.com (Server B dedicated server running Plesk 8.6, Unix,PHP/MySQL app)

My problem is that on Server B (stuff.mydomain.com) has a large application that sends out emails to users who have email accounts that are on Server A (www.mydomain.com). When this happens...the emails never get delivered. However, they do get delivered when they go to another domain or free accounts Like Yahoo/Hotmail.

I think there must be a setting someplace that decides to not send email out into the internet/network because it thinks user@mydomain.com is an email account on Server B (due to the domain name)...when in fact it is really on Server A.

Any ideas how to deal with this situation?

 

[Satoriya]

Hi,

You may check the following things:
- make sure mail service is disabled for such domain in Plesk CP on server B as it always checks first whether email is for local account and tries to send to local rather than to remote;
- also, make sure MX record for mydomain.com points to server A:
> host -t mx mydomain.com