Tag Archives: sendmail

Email’s sending using sendmail is slow – log says unable to qualify my own domain name

If you’re using sendmail to send emails and response from server is very long and your mail.log or mail.info says something like this:

Jan 10 11:13:27 HOST sendmail[24278]: unable to qualify my own domain name (HOST) -- using short name

thats the result of setting wrong hostname. Try to set FQDN from root to correct value:

hostname mydevsrv.domain.com

After that sendmail should gain some speed.

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