2 of 3 email addresses won't send emails

[Eileen_Beverly]

I have 3 @TPG email addresses. All 3 will receive emails. However, only 1 of them will send emails, the other two won't send.

I am using Microsoft Outlook.

[luisc]

Hi,

Coudl you advice which error message comes from the outlook??

thanks

[Eileen_Beverly]

Task '____@tpg.com.au - 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 ____@tpg.com.au is banned from using SMTP AUTH due to previous abuse'

Task '____@tpg.com.au - 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 ____@tpg.com.au is banned from using SMTP AUTH due to previous abuse'

[luisc]

Hi

I am checking this issue with the engineer team, in any case you may check your configuration while we are troubleshooting it.

Thanks

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_win10/outlook-365-sending-er...