Email notification failed: failed to send using smtp: timed out

[nbraun1]

Describe the bug
I have configured the environment variable NOTIFICATION_URLS so that an e-mail notification is possible in the event of a failed backup:

smtp://mail%40domain.com:ls3wer%263%23%21dksa45@smtp.office365.com:587/?from=mail%40domain.com&to=mail%40domain.com&fromname=backup&title=Backup

But I get an error message:

An error occurred calling the registered hooks: runHooks: error running hook: notify: error notifying: sendNotification: error sending message: failed to send using smtp: timed out

I also played around with shoutrrr's query parameters like Auth and Encryption as described here.

Version (please complete the following information):

• Image Version: v2.33.2
• Docker Version: 24.0.7
• Docker Compose Version (if applicable): v2.21.0

EDIT: I have tried the same url without url encoding, but the error is always the same.

[m90]

This is a duplicate of #216

Unfortunately there is nothing around this isse that can be fixed in this tool, as your server does what is said in the error message: it times out. Maybe you can look for issues around the internet that describe the same phenomenon when connecting to Office 365 SMTP servers?