Email Forwarding and Redundancy

Operating Systems & Open Source
1

Hi All!

At the time of this post, my email provider (Tutanota) has been down for over 7 hours due to a DoS attack. To avoid being in this situation again, I would like to add some redundancy and use another provider (ProtonMail) alongside Tutanota. My plan is to register a domain, setup an email account on that domain, and then forward those emails to both Tutanota and ProtonMail inboxes.

Does this make sense? How can I set this up, or is there an easier way to go about this?

Thanks in advance!

2

That won’t work if the service forwarding the email is not working.

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3

https://tools.ietf.org/html/rfc5321

Properly functioning mail servers should follow RFC5321 which requires retries when messages fail to send.

While a 4 day retry window is not explicitly required, it’s generally considered a rule.

If you need more reliability than that, you should look at setting up a load balancer so that your public endpoint for mail is never offline.

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