Mail not coming through from some domains

GAMPort

Member
Aug 13, 2001
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0
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Mails sent from certain domains are not coming through to the server while mails from most of the domains seems to come through. Below are some of the errors I can see:

[email protected] R=lookuphost T=remote_smtp:
SMTP error from remote mailer after MAIL FROM:
SIZE=1591: host some.host.header [123.456.78.9]:
553 hostname.mydomain.com does not exist

[email protected] :
unknown local-part &wcwd& in domain &hostname.mydomain.com&

anyoe got an idea to what could be wrong?

EDIT:
Managed to fix it but 99% sure I found a bug in CPanel that I will submit as soon as I maanage to describe it in writing.