How to fix sendmail error on Ubuntu

Hello,

 If you ever face below error on running sendmail on the Ubuntu server. Then please do the following fix.

error
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/etc/mail/sendmail.cf: line 100: fileclass: cannot open '/etc/mail/local-host-names': Group writable directory

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Make a copy of  /etc/mail/sendmail.cf on the server before we edit it.

Fix

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Replacing line Fw/etc/mail/ local-host-names with line Fw-o /etc/mail/local-host-names in sendmail.cf, and Ft/etc/mail/trusted-users with line Ft-o /etc/mail/trusted-users in submit.cf and sendmail.cf.

save the file after making the above changes and then restart it.

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Reference-

http://forums.fedoraforum.org/archive/index.php/t-199647.html

Regards
Syamkumar.M