Jonathan McKeown

@ObsidianUrbex@mstdn.social o/ Last night I had the strangest dream… o/

@rbos@mastodon.novylen.net Yes. I'm going back a ways, but I first implemented it on a sendmail and Cyrus IMAP setup. It involved a couple of minor changes on the sendmail side (essentially ignoring the plus part during incoming address rewriting and then adding it back to the final delivery address); and a permission change, adding the p permission to mail folders to allow delivery on the Cyrus side. I'm fairly sure we did it at my next employer too, with exim and Cyrus. It Just Worked for every user

@rbos@mastodon.novylen.net Oh it works to the extent that adding a plus part has no effect on delivery to the inbox (I also tested). What I remember (and what I certainly set up when I was adminning email) was that user+foo@example.com would look for a mail folder belonging to user and called foo, and deliver direct into that mail folder if it existed.

@rbos@mastodon.novylen.net @ericphelps@mastodon.social Interesting: I could have sworn that once upon a time, if there was a mailbox name corresponding to the part after the +, Google would deliver mail into that mailbox. Experiment says no. Maybe I'm confusing it with email setups I tended to in my sysadmin days, where I made sure that worked.

@aspensmonster @jwz @claudius @mathowie I might be wrong, but as I understand it phone numbers are hashed on registration and only the hash retained; there's no plaintext list of phone numbers to hand over. Threema doesn't require any information at all, but I've seen people question its security. I don't know enough to comment.