Hi, This is a off topic but I am a thunderbird user when I don't use mutt. (using mutt right now, but the thunderbird window is open). I upgraded my home network from 7.3 to the latest snapshot in the last two days and I saw a that thunderbird did change, but oh it did change in behaviour too!
Last year almost to the day (August 30th, 2022) mozilla changed the code to parsing the APOP greeting and I'd like to point out how I make use of that. https://hg.mozilla.org/comm-central/diff/737cf4def8c2298f83504b7e99a2d1b9b6d9c1f5/mailnews/local/src/Pop3Client.jsm So in the APOP greeting the statusText is allowed any character between 0x0 and 0x7f in this format /<[\x00-\x7F]+@[\x00-\x7F]+>/. I have modified my POP3s server now to give out these characters (it did give out base32 before but yesterday I saw disconnects on that for some reason by thunderbird). This is the greeting that thunderbird for some odd reason disconnected on: ---> 0000: 2b 4f 4b 20 3c 72 68 68 61 6d 61 35 39 62 67 6a +OK <rhhama59bgj 0010: 63 68 64 33 33 40 6c 76 61 68 38 74 65 63 6d 61 chd33@lvah8tecma 0020: 31 69 64 30 6e 71 32 37 6d 72 31 33 31 33 3e 0d 1id0nq27mr1313>. 0030: 0a <--- I thought it was strange, maybe my tls'ized popa3d needed recompiling only? So here is what I have done for this greeting: ---> 0812/stern$ openssl s_client -connect pop3.delphinusdns.org:995 -quiet|cat -v depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1 verify return:1 depth=1 C = US, O = Let's Encrypt, CN = R3 verify return:1 depth=0 CN = pop3.delphinusdns.org verify return:1 +OK <$CMK^Gu3Z^^^A)j^]&h^Lf@vch^ZE^P$3g>^M <--- What's weird is with this recompile and change we say in germany that thunderbird is "pudelwohl" (comfy like a poodle dog). And I don't have any more disconnects before authentication attempts. It's not entirely compatible with say fetchmail (the first incarnation with the base32 was though) but I only use thunderbird for pop3 these days. And I kicked my users off at the beginning of the year, so it's good. I'm still boggled by the base32 trigger behaviour that thunderbird should not authenticate. It wasn't always and that hexdump is all I have before I changed the code. Best Regards, -peter PS: for trivia, what does javascript do when given a 0x0 character? Does it use that for terminating strings? I was thinking of modifying my popa3d server to do that but it's more trouble than it's worth becuase it passes a lot to vsnprintf(). -- Over thirty years experience on Unix-like Operating Systems starting with QNX.