email accounts being used to send mail

[StargazeR82]

What does a question mark after and email address followed by another completely separate email address mean. Some one is using the computers on our network to do some squirrly stuff and they are sending junk mail to each other too. Recommendations?

 

[jpm121]

We need a LOT more info.

E-mail client & type (exchange, pop/smtp??)

Where are you seeing these headers?

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