Nagios Support Forum

Do you know if your Nagios system it using Sendmail or Postfix as the mailer daemon for sending emails? Do you see any errors in the /var/log/maillog file when the system tries to send an email notification? If you do see an error, can you post it here so we can view it? Thanks ye,ther error,will s...

I have the same problem with nagios 4.3.4.Well that there is an already existing topic for discussion.
I tried the tips that are provided above.
It did not work out.Still no email alert.. I hope this is not a very old topic, give me advice please.Thanks!