Hi, I have been having a problem for several months now sending outgoing mail when using either the Windows 10 mail app or using the iPhone mail app. it keeps telling me that the password or settings are incorrect (the password is fine). The mail will just sit in the outbox then after anything between a couple of hours to a couple of days then the mail just sends itself. Sometimes when using my phone if i turn wifi off on my phone & go onto 4G the mail will instantly send.
I can receive all mail no problem.
If i login to webmail via any browser it all works fine. What's going on?