Random incoming e-mails seem to arrive hours after they are actually sent. I would say it happens 1 out of 20 e-mails. Only afew users on my network have complained.
I did notice that tyesterdays e-mail was received 4 hours later from a yahoo sender. I had them test with me this morning, the first one has not arrived (1 hour so far), a second one sent 10 minutes after the first one arrived in 10 seconds.
Any ideas on what might be the issue and if it could be on our side would be appreciated.