Good afternoon

I have been using Dovecot with great success for several months now with one problem:

I have received several messages (3 to date out of a much larger number) which cause Dovecot LMTP to drop the connection with sendmail after only receiving the first part of the message.

Dovecot saves the first part to INBOX, and then drops the link with sendmail as it sees the rest of the data from sendmail as new (and invalid) commands

Sendmail sees the delivery as unsuccessful and requeues the message, so the cycle continues until i kill the queue

These messages are all Multipart MIME

I have attached an extract from the log which shows the above sequence

Finally, I have kept one such message from the sendmail queue (df and qf) should this be useful, but prefer not to post here as not sanitised 

Any help in correcting my configuration would be appreciated.

Thanks

Steve

<snip>

Hi Steve

strange as it sounds, looks like your mta is sending the lmtp end of message sequence (<CRLF>.<CRLF>)in the middle of an email.

You might be able to debug it in dovecot with lmtp_rawlog_dir setting which will show the input and output dialog of the lmtp session.

John