[THIN] ImaSrv.exe sending e-mail

After installing McAfee on some old Citrix VM's, I am seeing blocking of
outbound TCP/25 from ImaSrv.exe from some, but not all of the server. A
few hits on bootup of the VM. What does ImaSrv.exe send out e-mails
for? Where would I look to see how the servers are set differently?
CPS 4.0 R03
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