I am using Outlook 365 (Listed Version 15.0.4885.1001), POP/SMTP, and have no trouble receiving emails, however cannot send. I can still send from my browser access, and this problem has only occurred today (with no changes to anti-virus software, usage habits or software). The error message is displayed below:
Task *** Email address is removed for privacy *** - Sending' reported error (0x800CCC78) : 'Cannot send the message. Verify the e-mail address in your account properties. The server responded: 535 5.7.8 [TPG-A02] Authentication denied. User *** Email address is removed for privacy *** is banned from using SMTP AUTH due to previous abuse'
Thank you for your help.