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Linux - Networking This forum is for any issue related to networks or networking.
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Old 04-19-2004, 12:01 PM   #1
Registered: Jul 2003
Location: Texas
Distribution: Mandrake
Posts: 65

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Sendmail is rejecting some mail

I am running sendmail.
It is running behind a firewall with the proper ports being forwarded (25,110) to the correct box. I am getting occasional failures receiving e-mail from the same address, ie paypal payment notices are getting through about 30%-50% of the time. Out of 5 e-mails sent from paypal, I may only get 2-3. Another example is my home address from is failing, but a coworkers from the same provider is getting through. I was thinking some DNS issue, but DNS appears to be working. Any thoughts?
Old 04-19-2004, 05:03 PM   #2
Registered: Feb 2004
Location: Outermost mingetty
Distribution: RHEL3,RH4U4,Sol9, Sol10
Posts: 321

Rep: Reputation: 31
Could be failing reverse DNS, which mail uses to validate sender's address.
Old 04-20-2004, 11:18 AM   #3
Registered: Jul 2003
Location: Texas
Distribution: Mandrake
Posts: 65

Original Poster
Rep: Reputation: 15
I would think that too, but why do some get through and some don't? Do i need to reconfigure DNS?


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