this post was submitted on 12 Feb 2026
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[–] Ulrich@feddit.org 10 points 3 hours ago (1 children)

TL;DR: Viva.com, one of Europe's largest payment processors, sends verification emails without a Message-ID header — a recommendation of RFC 5322 since 2008. Google Workspace rejects them outright. Viva's support team's response to my detailed bug report: "your account has a verified email, so there's no problem."

[–] SomethingWentWrong@lemmy.ca 2 points 1 hour ago

I had a company I was doing business with reject a valid email address of mine because it contained a "." character in it. I got an error message about this being invalid email address to use. My "first.last@emailprovider.com" address had no problems sending/receiving emails with anyone else.

There should be some simplified standard way to identify what combination of email configuration is/isn't supported by companies and email providers. This can also future proof against future changes in email configuration changing over time due to the ongoing fight against spam.