[exim-dev] [Bug 2174] callout timeout in recipient verify ca…

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To: exim-dev
Vecchi argomenti: [exim-dev] [Bug 2174] New: callout timeout in recipient verify can result in the the lost of the TLS incoming connexion
Oggetto: [exim-dev] [Bug 2174] callout timeout in recipient verify can result in the the lost of the TLS incoming connexion
https://bugs.exim.org/show_bug.cgi?id=2174

--- Comment #12 from Xavier Montagutelli <xavier.montagutelli@???> ---
Thank you Jeremy for your analysis.

We have further analyzed the problem. It occurs when Exim is compiled against
GnuTLS, not when using OpenSSL.

We have tried using stock exim source (both 4.89 and 4.90), compiled on a
Debian host (9.3), against Debian GnuTLS (3.5.8-5+deb9u3), against stock GnuTLS
(3.5.17) and against Debian OpenSSL (1.1.0f-3+deb9u1)

I have added a simplified "configure" file for exim to test (see previous
comment, sorry for double posting)

The problem happens when connecting over SSL :

# openssl s_client -connect localhost:465 -quiet
...
EHLO nan.dom
...
MAIL FROM: <nan@???>
250 OK
RCPT TO: <nan@???>
250 Accepted
DATA
421 test-exim.unilim.fr lost input connection
read:errno=0

This works when connecting on port 25, or when using exim compiled against
OpenSSL.

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