User Agent: Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko/20100101 Firefox/11.0 Build ID: 20120312181643 Steps to reproduce: I upgraded my thunderbird lately to 11.0.1 and since then i get an error while sending mail. I tried to install a new account because of the error completely as shown by my provider especially for thunderbird users, but the error remained the same, in both cases I can receive mail, but I cannot send. I only can send the mail via the webversion of the provider, but not through thunderbird Actual results: I got the following message in dutch: Verzenden van bericht mislukt. Het bericht kon niet worden verzonden omdat de verbinding met de SMTP-server mail.zeelandnet.nl werd verbroken in het midden van de transactie. Probeer het opnieuw, of neem contact op met uw netwerkbeheerder. It means: sending of the message failed. The message could not be sent because the connection with the SMTP-server mail.zeelandnet.nl was abrupted in the middle of the transaction. Try again, or contact your networkmanager. Expected results: The mail should be sent, but it is not. The helpdesk of my mail provider says its a known problem for users of thunderbird after this update, and I should use another mail program, but I just want to keep using thunderbird.
Please attach a SMTP log: https://wiki.mozilla.org/MailNews:Logging
SSL right? I'd bet bug 702111. Does setting NSS_SSL_CBC_RANDOM_IV=0 work? If that is the case, the server software needs to be fixed...
Maybe he could turn off using SSL for the server till it is fixed.
Thank you all for trying to help me. I do not know how to find a smtp log on my computer, I tried with all three settings for the security, but that did not solve my problem I also restarted my thunderbird after altering the setting, but I still got the same error message. I cannot find a setting NSS_SSL_CBC_RANDOM_IV=0. I am just an ordinary user at home. But I appreciate your help very much, because I do not want multiple mail programs on my pc, because I do not want to search for long on which programm I received a certain e-mail, and my webmail has a very limited inbox.
I am sorry, I found another place to change the settings, I removed the setting there and it worked, thanks for helping me. Kathy
Which setting did you change? Re NSS_SSL_CBC_RANDOM_IV=0: that's an environment variable. One would have to open a command window and do something like SET NSS_SSL_CBC_RANDOM_IV=0 thunderbird.exe
WFM per comment 5, and no further response from reporter