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04-21-2009
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Sendmail error: 550 5.1.8 invalid/host-not-in-DNS
I have sendmail setup to relay through my external ISP. Everything was working fine until I started getting the error message (below). I don't what I did to cause this? I have read a number of related posts and it appears that I might need to configure the sending address of my server to appear differently but I am not sure if this is right or how to do this. Thanks for the help.
The original message was received at Sun, 19 Apr 2009 12:11:09 -0400 from trixbox1.localdomain [127.0.0.1] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.1.8 invalid/host-not-in-DNS return address not allowed) ----- Transcript of session follows ----- ... while talking to outgoing.verizon.net.: >>> MAIL From: SIZE=32121 <<< 550 5.1.8 invalid/host-not-in-DNS return address not allowed 554 5.0.0 Service unavailable |
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