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So you think you can validate email addresses A journey down RFC5321
About this video
Stavros Korokithakis gives a FOSDEM 2018 talk on how hard it is to validate email addresses properly, taking a tour through RFC 5321.
Why it appears in the archive
Linked whenever email validation comes up as a fun illustration of how deceptively difficult it is.
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From the Hacker News discussion
The email standard does include the +, yes. Here's a talk on the topic: [VIDEO] But yes, that's why Fastmail supports the alternative syntax.
Read original comment ↗always relevant: "So you think you can validate email addresses": [VIDEO] Which is also why proposals to put email certs (S/MIME, OpenPGP) in the DNS led to hashing the local part, as DNS only allows ASCII and is case insensitive.
Read original comment ↗I gave a very fun talk on the topic in FOSDEM (VOLUME WARNING!): [VIDEO] It's more a joke than edifying, but it was very fun for me (and, I think, the audience), and illustrates the difficulty of email validation well.
Read original comment ↗This is fun, but it feels suspiciously close to my old presentation about the exact same thing: [VIDEO] Maybe it's just a coincidence, but a shoutout would have been nice if not.
Read original comment ↗