I also reached out to them on Twitter but they directed me to this form. I followed up with them on Twitter with what happened in this screenshot but they are now ignoring me.

  • dan@upvote.au
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    9 months ago

    You can use symbols like [ ] . { } ~ = | $ in the local-part (bit before the @) of email addresses. They’re all perfectly valid but a lot of email validators reject them. You can even use spaces as long as it’s using quotation marks, like

    "hello world"@example.com
    

    A lot of validators try to do too much. Just strip spaces from the start and end, look for an @ and a ., and send an email to it to validate it. You don’t really care if the email address looks valid; you just care whether it can actually receive email, so that’s what you should be testing for.