I am sorry for spamming. I have found the reason of the problem so maybe it might be helpful for people who will face the same problem in future.

I did not set NOBODY option previously in my code so the connection between SMTP server and client was ongoing. That's why in the second try, Free function could not delete the first message : free(smtpc->domain);

It was working on SSL because after each connection, SSL session was closed automatically. Using the NOBODY option solved the problem.

Best regards,

Nazim

From: nazim_oztahtaci_at_hotmail.com
To: curl-library_at_cool.haxx.se
Subject: Curl_dofree function
Date: Tue, 1 Nov 2011 08:12:50 +0000

Hello everyone,

When I try to send email via my module using curl, I use two options: Use SMTP+TLS and Use regular SMTP.
When I send emails over TLS, I can send without any problems during test stage. However, when I start my test phase using regular SMTP to send email, in the second email, after the state is changed from DATA to STOP, I dont receive "DO phase is completed" and throws an exception like this:

assertion "ptr != ((void *)0)" failed
--------------------------------------------------------------------------------
  file : memdebug.c line 293
  function : curl_dofree

Is this related to some variable or structure that I didnt free up?
                                               

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Received on 2011-11-01