Hi @Retired_Old_Guy ,   Welcome to the community!   We did an article that you may find helpful, this will guide you a basic troubleshooting on how to fix SMTP issues. Please see the link below.   Cannot Send Email Rejected by the Server/Banned from using SMTP    Let us know how it will go.   Cheers!   @Retired_Old_Guy wrote: why am I getting this when trying to send emails Task 'panipuccisuper@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 panipuccisuper@tpg.com.au is banned from using SMTP AUTH due to previous abuse'   ... View more