[Dovecot] debug user's message retrieval

[Костырев Александр Алекс]

Hi there!

Is there any method to log user's activity with pop3 service?

I'll try to explain situation:

In maillog I saw that my dovecot lmtp saved four letters in user's
mailbox.
After a while I got a call from that user saying that he received
nothing.

Is there any method to log that that user RETR every single letter,
maybe with full names of letter's id or something like that?