Hi,
I am using stunnel 4.15 on Windows XP SP1 with Mozilla Thunderbird as the e-mail client. I do not have openSSL installed locally. I do have the libssl32.dll and libeay32.dll in the same directory as stunnel.exe (C:\Program Files\stunnel). I am running stunnel as a service.
Stunnel crashes when I use it to send e-mail (SMTP via TLS) via gmail.
According to the e-mail client configuration page on the gmail website http://mail.google.com/support/bin/answer.py?answer=13287&topic=1555
I tried to use SMTP over TLS to connect to smtp.gmail.com:587
My gmail-smtps block in stunnel.conf was
; SMTP service, listens on localhost:250 [gmail-smtps] protocol=smtp accept=localhost:250 connect=smtp.gmail.com:587
On trying to send an e-mail message via the above configuration stunnel crashed. The log file is as follows
2006.06.14 03:17:15 LOG5[3956:3512]: stunnel 4.15 on x86-pc-mingw32-gnu with OpenSSL 0.9.7i 14 Oct 2005 2006.06.14 03:17:15 LOG5[3956:3512]: Threading:WIN32 SSL:ENGINE Sockets:SELECT,IPv6 2006.06.14 03:17:15 LOG5[3956:3600]: No limit detected for the number of clients 2006.06.14 03:17:15 LOG7[3956:3600]: FD 172 in non-blocking mode 2006.06.14 03:17:15 LOG7[3956:3600]: SO_REUSEADDR option set on accept socket 2006.06.14 03:17:15 LOG7[3956:3600]: gmail-pop3s bound to 127.0.0.1:1100 2006.06.14 03:17:15 LOG7[3956:3600]: FD 180 in non-blocking mode 2006.06.14 03:17:15 LOG7[3956:3600]: SO_REUSEADDR option set on accept socket 2006.06.14 03:17:15 LOG7[3956:3600]: gmail-smtps bound to 127.0.0.1:250
....# info about other mail connections
2006.06.14 03:17:26 LOG7[3956:3600]: gmail-smtps accepted FD=236 from 127.0.0.1:3665 2006.06.14 03:17:26 LOG7[3956:3600]: Creating a new thread 2006.06.14 03:17:26 LOG7[3956:3600]: New thread created 2006.06.14 03:17:26 LOG7[3956:2812]: gmail-smtps started 2006.06.14 03:17:26 LOG7[3956:2812]: FD 236 in non-blocking mode 2006.06.14 03:17:26 LOG7[3956:2812]: TCP_NODELAY option set on local socket 2006.06.14 03:17:26 LOG5[3956:2812]: gmail-smtps connected from 127.0.0.1:3665 2006.06.14 03:17:26 LOG7[3956:2812]: FD 268 in non-blocking mode 2006.06.14 03:17:26 LOG7[3956:2812]: gmail-smtps connecting 64.233.167.111:587 2006.06.14 03:17:26 LOG7[3956:2812]: connect_wait: waiting 10 seconds 2006.06.14 03:17:26 LOG7[3956:2812]: connect_wait: connected 2006.06.14 03:17:26 LOG7[3956:2812]: Remote FD=268 initialized 2006.06.14 03:17:26 LOG7[3956:2812]: TCP_NODELAY option set on remote socket 2006.06.14 03:17:26 LOG5[3956:2812]: Negotiations for smtp (client side) started 2006.06.14 03:17:26 LOG7[3956:2812]: <- 220 mx.gmail.com ESMTP w66sm450524pyw 2006.06.14 03:17:26 LOG7[3956:2812]: -> 220 mx.gmail.com ESMTP w66sm450524pyw
<logfile ends>
What mistake am I making?
Fortunately it seems that gmail supports SMTP over SSL too (smtp.gmail.com:465) and I am using that. However I am also facing this problem with another account which unfortunately allows SMTP only over TLS.
Thanks, Shatadal.
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