From Postmaster Email Bouncing

[Kay Irmer]

The external IP of an international Mailserver must have an DNS resolution
and from my point of view also an valid Mx entry.
A reverse DNS should also be given.
For internal Subdomains masquerading to the main domain could also incr

Am 07.06.2012 um 19:02 schrieb Al Cooper <cooper at hmcnetworks.com>:

Hi All,



A few weeks ago my server’s emails sent from the postmaster user started to
bounce with the following error message:



The following addresses had permanent fatal errors ----- <user>@domain.com

    (reason: 553 5.1.8 <root at server.domain.com>... Domain of sender address
root at server.doman.com does not exist)

    (expanded from: <root at server.domain.com>)



It appears that my email is being blocked because there are not DNS records
for the sub-domain server.domain.com.



If this is correct how do I change the postmaster sender address from
server.domain.com to domain.com?



Or is there a better solution?



Thanks for your help,



Al

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