Email not working in 2021?

7th January 2021

Microsoft has disabled TLS 1.1 and older, and emails that don’t encrypt at all. And Basic authentication. we noticed on 4Jan2021.

Possible work-arounds and fixes:

a good first step would be to adjust the email settings, add authentication if it is not enabled.

Update your software or firmware. If available this is the best option as it will use the newer, more secure versions of TLS. The procedure will be different for each device and you may need to call support or do a search on their support site.

many 3rd party SMTP relay services still support the old protocols. SMTP2go.com worked for us. remember to add your PUBLIC IP address under settings, IP authentication. this works even if your device doesn’t support authentication. Limits for a free account are 25 emails per hour, and it may queue emails outside these limits. The web interface is verbose and excellent for troubleshooting.

You could also install your own SMTP relay onsite but I would only advise this if you exceed the limits of SMTP2go.