From Postmaster Email Bouncing

[Al Cooper]

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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