On Thu, 3 Apr 2025, Winni Neessen via mailop wrote:
Hi Viktor,
On Thu, 3 Apr 2025 at 04:51:12, Viktor Dukhovni via mailop wrote:
Nothing unusual without invalid PIPELINING:
posttls-finger: > RSET
[...]
Interesting. I can reproduce this issue with openssl s_client without exception.
,---[ openssl s_client -connect smtp.qq.com:465 -crlf -ign_eof | tee qq.out ]
| 220 newxmesmtplogicsvrsza36-0.qq.com XMail Esmtp QQ Mail Server.
| EHLO test.de
| 250-newxmesmtplogicsvrsza36-0.qq.com
| 250-PIPELINING
| 250-SIZE 73400320
| 250-AUTH LOGIN PLAIN XOAUTH XOAUTH2
| 250-AUTH=LOGIN
| 250-MAILCOMPRESS
| 250-SMTPUTF8
| 250 8BITMIME
| RSET
| 250 OK
| QUIT
|
| 221 Bye.
`---
When looking at the empty line between "QUIT" and "221 Bye." with xxd, I see
the binary byte sequence:
,---[ xxd qq.out ]
| 00001440: 3842 4954 4d49 4d45 0d0a 3235 3020 4f4b 8BITMIME..250 OK
| 00001450: 0d0a 0000 001a 0000 000a 0000 0000 0000 ................
| 00001460: 0000 3232 3120 4279 652e 0d0a ..221 Bye...
`---
I get those bytes too, followed by the error message
405757CD017E0000:error:0A000126:SSL routines::unexpected eof while
reading:../ssl/record/rec_layer_s3.c:687:
# host smtp.qq.com
smtp.qq.com has address 43.129.255.54
smtp.qq.com has IPv6 address 240e:ff:f100:1009::120
--
Andrew C. Aitchison Kendal, UK
and...@aitchison.me.uk
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