While working on a linux dedicated server without any control panel on it, the sendmail service starts very slow – it takes almost 7-10 minutes. While investigating the server, we checked the hostname and it was as below:

root# hostname
MarkSmith

we found that the hostname did not resolve, to get this fixed we used a valid domain which resolved to this server – so we changed the hostname of the server.

And, the sendmail responded very quickly and worked fine.

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