Certain emails are not arriving in client's account

[mikehermary]

Hello,

My client is experiencing issues with certain emails not arriving in their accounts. This includes the main inbox and junk folder. They have accessed the affected accounts using webmail and the messages are not sitting there. The recipient account is cleaned out daily, so limited space is not an issue. There is no spam protection setup in Plesk, so this should not be the issue. The sender email address is not receiving a bounce back message after the messages fail to arrive in the recipients inbox. The sender's IT department has stated the problem is on the recipient's end, but I am not sure where to start looking for the problem. Would searching the mail logs produce any leads? Any assistance would be greatly appreciated. Thank you.

Mike
Plesk 11.5.30 Update #32
Media Temple DV 4.0 Server
Installed mail server is Postfix

 

[Faris Raouf]

check /usr/local/psa/var/log/maillog to see if the message is arriving at all, and if it is what is happening to it.

Be aware that you are now 10 microupdates behind - MU#42 was just released. Being so far behind with MUs is kind of dangerous. Be sure to backup your system before installing them though!