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Help From Community – Solved !!

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I did promise to come back and update you after the problem resolved, but before that i am grateful and personally thanking to everyone for their  input, efforts & energy.

Dear Markus Falb,

i apologies for my statement yesterday, i actually missed the part of your email, undoubtedly the information you sent was very much valuable and helped to resolve the cause. i do not hesitate to accept that i did not know about call back function before your email.

Again special Thanks to Reindl Harald & Markus Falb, they made me to understand what i need to do in order to resolve the cause.

FOLLOWING HAS RESOLVED THE PROBLEM:

  1. As you all know, that server where i was sending the message to was configured for address verification & having incorrect PTR records.
  2. When it was coming back for address verification, my server was not accepting connection.
  3. Because my server was configured for “reject_invalid_helo_hostname”

i have to disable following in main.cf to deliver the mails to that server.

reject_invalid_helo_hostname
reject_unknown_client_hostname
reject_invalid_hostname

Thanks / Regards
Prabhpal


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