hotmail - doesn't handle attachments using Thunderbird and couldn't send my public ID key using attachments or a simple cut/paste.
Hotmail handles attachments very well in Thunderbird.
And I just sent an encrypted test mail from my Hotmail and it worked. Pub key attachment included.
Thanks for the reply.
Which version of Thunderbird are you using? I read that hotmail had attachment problems after version 3.*.*. I have version 16.0.1. Also, are you using a VPN client like hotspotshield while using Thunderbird? I have hotspotshield enabled.