[Exim] STARTTLS and signal 11

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Autor: redmyrlin
Datum:  
To: exim-users
Betreff: [Exim] STARTTLS and signal 11
I recently started getting "frozen" messages when trying to connect to a
particular mail server.
Previously I had had no trouble, but I believe the mail server for the
particular domain has just changed.
The relevant part of the debug message shows:
====================================================
Connecting to smtp.us.messagingengine.com [66.111.4.20]:25 ... connected

read response data: size=36
SMTP<< 220 mail.messagingengine.com ESMTP
SMTP>> EHLO myHostName

read response data: size=155
  SMTP<< 250-mail.messagingengine.com
         250-PIPELINING
         250-SIZE 10120000
         250-ETRN
         250-STARTTLS
         250-AUTH LOGIN PLAIN OTP
         250-AUTH=LOGIN PLAIN OTP
         250 8BITMIME
66.111.4.20 in hosts_avoid_tls? no (option unset)

SMTP>> STARTTLS

read response data: size=24
SMTP<< 220 Ready to start TLS
Initialized TLS
Calling SSL_connect
SSL_connect succeeded
reading pipe for subprocess 75562 (not ended)
read() yielded 0
remote delivery process 75562 ended: status=000b
set_process_info: 75561 delivering 19YExa-000Ptt-9Z
post-process me@??? (1)
LOG: MAIN
== me@??? R=dnslookup T=remote_smtp defer (-1):
smtp transport process returned non-zero status 0x000b: terminated by
signal 11
>>>>>>>>>>>>>>>> deliveries are done >>>>>>>>>>>>>>>>

=================================================
I added the line

     hosts_avoid_tls=*


to my remote_smtp transport in the exim configure file and this cured
the problem.

I think what has happened here is that previously the receiving smtp
server didn't advertise TLS
capability, so my server connected without SSL. Now, on the new server,
it does advertise TLS
capability so my server tries to initiate an SSL link which fails
because I have not set up my OpenSSL correctly.

Has anyone else come across this behaviour? And what exactly is signal 11?

TIA
Graeme