Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

Why does Sendmail ignore the /etc/hosts file?

April 26, 2017file hosts sendmail

0

Posted

Why does Sendmail ignore the /etc/hosts file?

1 Answer

0

Posted

By default, Sendmail uses DNS for name resolution, not the /etc/hosts file. The behavior can be changed through the use of the /etc/mail/service.switch file. If you wish to query the hosts file before DNS servers, create a /etc/mail/service.switch file which contains the following line: hosts files dns If you wish to query ONLY the hosts file, use the following: hosts files Send Sendmail a HUP signal: # kill -HUP `head -1 /var/run/sendmail.pid` and the changes will take effect.