I am running into an issue with a stable macro that has been in place and relatively bug free. It matches a file name prefix with an email address assigned the same prefix, and it sends an email with the file to the corresponding person. Now, with Cloud based O-365, the macro runs but it gums up the outbox and takes sometimes 3-5 times as long to send.

My thoughts are more brainstorming a place to start tweaking rather then an all out solution from you guys. Though the latter would be appreciated, too LOL.