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Old 02-09-2019, 10:19 PM   #1
muqor
LQ Newbie
 
Registered: Feb 2019
Posts: 15

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Postfix: Illegal address from unknown sender


I got this alert from my maillog postfix

mail postfix/smtpd[13563]: warning: hostname riservata.miami19.mia.seabone.net does not resolve to address 195.22.199.54: Name or service not known

Do you think this is a security concern?

How to prevent this to happen again.

TIA
 
Old 02-10-2019, 08:13 AM   #2
bathory
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Registered: Jun 2004
Location: Piraeus
Distribution: Slackware
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Quote:
Originally Posted by muqor View Post
I got this alert from my maillog postfix

mail postfix/smtpd[13563]: warning: hostname riservata.miami19.mia.seabone.net does not resolve to address 195.22.199.54: Name or service not known

Do you think this is a security concern?

How to prevent this to happen again.

TIA
Don't bother.
This is common for mail-servers sending spam.

Regards
 
  


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