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Old 02-11-2014, 02:48 AM   #1
Hermes101
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Registered: Oct 2011
Location: Lithuania
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450 4.7.1 Client host rejected: cannot find your hostname,[XXX.XXX.XX.XX]


My Postfix server working about 3 years with main configurationand several additions.
Now I noticed that we (all our domain users) cant send mails to one client.
All mails returns with this error:
The mail system

<receipt@receipt-address.com>: host mail.receipt-address.com[XX.XX.XX.XXX] said:
450 4.7.1 Client host rejected: cannot find your hostname,
[XXX.XXX.XX.XX]
(in reply to RCPT TO command)

I think it is something wrong in my configuration.
Please heading me where I must something correct?
 
Old 02-11-2014, 04:21 AM   #2
yongitz
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Registered: Nov 2005
Location: Davao City, Philippines
Distribution: RHEL, CentOS, Ubuntu, Mint
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This is probably a DNS issue. Can you confirm that your SMTP has PTR/DNS record setup. Most of the mail servers will not accept connection if you don't have a valid PTR/DNS record.

Last edited by yongitz; 02-11-2014 at 04:48 AM.
 
  


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