not receiving emails

Hello,

I have been told by several people that they have sent emails that we are
not receiving.  I am receiving some emails (mainly spam) but not emails
from people we regularly receive them from.  Our GM is having the same
problem.  our domain is [email protected].  Information on our
version of squirrel mail is below:

System information

You are using SquirrelMail version: 1.5.2 [SVN]
The administrator installed the following plugins:

    login_auth

Please advise.

Tya Harris



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