How to check a bounced back email

[Guest2]

Someone is trying to send an email to us but it is being bounced back. I know there is a 10mb limit on inbound mails. Is there a way to check why emails are being bounced back?

I have is his name and the time the email was sent. I think it takes a few hours to register but have forgot where to look. I have access to exchange, system manager and DNS records amongst other things

Thanks

edit - i have a feeling it might be on DNS records somewhere

 

[Guest2]

Think i have found it. Exchange system manager > tools > message tracking center

I dont have any other info other than someone was trying to send a message this morning and his name

 

[Guest2]

Track messages is on, just tested between me and a collegue and it finds messages. I have the address of the sender and it doesnt find any message. Must be server at his end or he has entered a wrong address or something