https://thwack.solarwinds.com/discussion/28334/ticket-submit-delay-when-using-and-external-smtp-server
Ticket submit delay when using and external SMTP server - THWACK
We're trying to migrate from our in house Exchange server to Office 365 and when trying to change the SMTP settings for Web Help Desk we notice a 10-20 second...
external smtp serverticket submitdelayusing