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Sounds to me like your email is set up as an IMAP account where everything is 'synced' with the mail server. &nbsp;If that is true, then network problems can cause you problems when they don't allow actions to 'complete'.
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Sounds to me like your email is set up as an IMAP account where everything is 'synced' with the mail server.  If that is true, then network problems can cause you problems when they don't allow actions to 'complete'.

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If its like that it is certainly unintentional and must be the default setting. How can i unsync this? I cant find any such settings.
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If its like that it is certainly unintentional and must be the default setting. How can i unsync this? I cant find any such settings.

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For a long time Thunderbird have given me problems. The most occurring one is when Thunderbird want to move a message to the &quot;sent&quot; folder - and for this need(or does not need) to access my mail-server. Now i also have problems with time-out for something simple like saving a draft to the draft folder. Today I quite a bit work in creating a mail that i wanted to save as a draft - but Thunderbird failed to do that and the whole mail is lost. As a programmer since the stone-age I really can not understand how its even remotely possible that a Windows program can not save a file to a specified folder over and over again.
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For a long time Thunderbird have given me problems. The most occurring one is when Thunderbird want to move a message to the "sent" folder - and for this need(or does not need) to access my mail-server. Now i also have problems with time-out for something simple like saving a draft to the draft folder. Today I quite a bit work in creating a mail that i wanted to save as a draft - but Thunderbird failed to do that and the whole mail is lost. As a programmer since the stone-age I really can not understand how its even remotely possible that a Windows program can not save a file to a specified folder over and over again.

What is Thunderbird doing?

An email client, email reader or more formally mail user agent (MUA) is a computer program used to access and manage a user's email. A web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.