What's the output of
dig mx mydomain.co.uk
Originally Posted by StevenD
Here is a bit more info.
This is from mail.log.ispconfigsave. I tried to send mail to a yahoo account from squirrelmail from email@example.com
but it looks like it tried to send it from firstname.lastname@example.org
You must set the correct sender address in the SquirrelMail settings of your account.