I have a user with an IMAP account and accessing through Mac Yosemite Mail App. The user just noticed that over the past month, none of their sent messages show up in the sent folder. Same is happening with 10.8 and 10.7 mail on this account. Sent messages are getting to recipients though.
During a chat with Dreamhost, I was told no sent messages came through Dreamhost servers over the past month.
Any insight on what may have caused this and how to resolve is appreciated.