Try using ssl or Tls encryption, it uses a different port. I have had issues with smtp on port 25 on various ISPs <div class="gmail_quote">On May 24, 2012 7:13 PM, "Wikus" <<a href="mailto:wikus@cheetah-microsystems.com">wikus@cheetah-microsystems.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Evening all, Is there anybody that have axxess as ISP and use Thunderbird ? I have constant issues with sending mail where the smtp just hangs. According to them nothing is wrong , so now I wonder , is it a software thing maybe ? Ubuntu or Thunderbird causing the issues ? It would work perfectly and then the next moment just hangs. And this happens on two seperate laptops , on two seperate networks on two seperate adsl lines. So the hardware , adsl line , router etc. is not to blame. - Wikus -- _ | | | | --- --- |J E S U S| --- --- | | | | | | | | My King --- -- ubuntu-za mailing list <a href="mailto:ubuntu-za@lists.ubuntu.com" target="_blank">ubuntu-za@lists.ubuntu.com</a> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-za" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-za</a> </blockquote></div>