Juan Pablo García wrote:
Hello guys,
I just configured everything as indicated by Linux Cookbook, I can
ping using names, resolving perfectly.
However, I'm still getting the "511 sorry, can't find a valid MX for
sender domain (#5.1.1 - chkuser)" message whenever sending test mail
with Squirrelmail.
Look in your logs and see what address the message is being sent from.
It may be different than what you're expecting.
chkuser is denying the message because it cannot look up a MX record for
the domain you're sending from.
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