Thunderbird Support Forum

Hello, I have 5 email addresses - four I use regularly: TalkTalk1 (Default) and 2, Free-online and Googlemail (haven't upgraded to gmail), and one I haven't for ages (YahooMail). I cannot send emails from any, except from my TalkTalk(TT) default one. I have updated the TalkTalk new Outgoing server settings to the best of my ability, for TalkTalk2 (TT2), Free-online (FOL) and Googlemail (GM) - I can send screenshots for each if necessary: - Server names: all smtp.domain name.net, except FOL: relay.free-online.net (verified on several google searches) - Outgoing port: all changed to 587 - Connection security: all STARTTTLS - Authentication method: all 'Normal password' (I am assuming these would be the same as the ones in the saved login passwords section of Privacy & Security, except for GM which has Incoming server authentication OAuth2 but a normal password in the saved login Passwords) - User name: my email addresses, except for FOL: my name Details: Email providers: TalkTalk, Free-online (Plusnet), Googlemail ISP: Talktalk.net Operating system: MacOS Catalina 10.15.7 Thunderbird version: 102.8.0 Many thanks for your help, it is now the 8th day I spend on this (I am a senior not very techy person).

I use thunderbird both on a linux laptop and under windows. I exported my private openPGP keys from Thunderbird on linux and imported them into the program on windows. When I use the windows program to send encrypted emails between accounts (e.g. from my gmail account to my hotmail account) the message can be decrypted but it says it has an invalid digital signature. This does not happen when I do this under linux. Any idea how I can fix this? Many thanks!