451 Greylisted leads to 1003,11
using SEP client on PC with own smtp server I've encountered misbehaviour of SEP scaning SMTP outgoing mails. SEP recieves mail from local SMTP and retunrs him ok, further it tryes to deliver to server using graylisting for spam protection gets a 451 respond, but insted of trying later again or returning this respond back to local smpt, it displays a message 1003,11. This behaviour results in non delivering the message.
Unfortunately I could not find possibility to switch off smtp check only. Switching off both pop3 and smpt check seems me not appropriate solution.
Please suggest some solution to keep messages checked by SEP and delivering them to servers using greylisting.