I have an issue very specific to outlook and a single email domain. I work for an email and website hosting company.
When sending one email to a foreign domain, no issues. When sending more then one email, the first email is sent fine but stalls sending the rest and sits in the outbox. Wireshark shows, both from the client and hosting server, that outbound authentication happens, first email is sent, second MAIL FROM: appears then it just does nothing. But, if I use a different email account from a different domain hosted from the same server it works fine.
Any thoughts.
DB it