We use SMTP forwarding but have problems with some target mail servers. It seems like our firewall adds its own host name as senders. The following message is returned.
I would of course like the domain to be the correct one: domain.com.
Please help!
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Connected to xx.yy.zz.yy but sender was rejected.
Remote host said: 451 ...Invalid domain, no MX nor A record found I'm not going to try again; this message has been in the queue too long.
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