> On Mon, Feb 20, 2017 at 02:48:15PM +0000, Luis Miguel Flores dos > Santos wrote: > > Hi, exist a way to know which mail client try or are connected in > > 587? Like Android Mail, Outlook, thunderbird? > > No, because to protocol doesn't care about "which client".
The actual problem, whatever it is, might be better addressed from the angle of the IMAP server. MUAs generally do much more with the imapd than with postfix/submission; the latter is typically a short, single transaction. Perhaps there is no associated IMAP login, in which case there's a high probability that you're faced with malware. -- http://rob0.nodns4.us/ Offlist GMX mail is seen only if "/dev/rob0" is in the Subject:
