Issues with SMTP and Office365

Cubik65536

I would like to use my Office365 email account for sending forum emails, but I've got an error The selected mail encryption is invalid..

Here's the POP, IMAP, and SMTP settings by Microsoft Support.

Here's my setting:

Host: smtp.office365.com
Port: 587
Encryption: starttls
Username: noreply@domain.tld
Password: ***********

How do I fix this issue?

GreXXL

Cubik65536 see documentation. https://docs.flarum.org/mail.html#available-drivers - meaning starttls is not a supported input.

Cubik65536

GreXXL I've got it, thanks!

Cubik65536

Just a note for those who have met the same problem and found this post:

tls works well as the encryption setting, and you should enable Authenticated SMTP in Microsoft 365 admin center -> Users -> Mail -> Manage email apps. This worked for me. 😃

katos

Cubik65536 What are your settings in the ACP?
I've got SMTP on Microsoft 365 business, and it seems to fail for Flarum using the test mail 🤔

tankerkiller125

katos Make sure you have legacy authentication turned on. By default all newer installs don't have legacy auth turned on. And in some cases Microsoft will actually force modern authentication. Also if your using MFA make sure to use an app password.

Cubik65536

katos I did not change anything to my ACP settings (I actually don't know how to change it). By the way, just to make sure, what I did works for the "Enterprise" version of Microsoft 365 (E3/E5 subscription, and I'm currently using an E5 developer subscription), which the account finishes with @ our own domain, not @outlook.com or @hotmail.com.