Office 365 Email Account with 2 Factor Authentication

[Bigbeam]

Trying to setup the email address for notifications. I am on O365 and use 2 factor authentication. I generated an app password but will not send a test email. Any idea what is wrong?

 

[Bigbeam]

Oh and this is on a google cloud server...

 

[YiannisH_3CX]

Hello @Bigbeam

Please note that google restricts the outbound connections to the standard SMTP ports as mentioned in this article: https://www.3cx.com/docs/hosted-pbx-google-cloud/#h.isd0qddfoy3r
Try configuring a google account and try sending an email with that
https://www.3cx.com/blog/docs/gmail-mail-server/