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The existing account that you use today has a password for this. If you use a different ID and password because you create this so that this forms an account for a new connection, this all happens on the same Thunderbird server of Thunderbird Imap related or pop that is Okay. so try to create a new account that is your email address and the password for a new connection. Each new ID is associated with a new or different account. The server will remain in use the same for this.

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If you can set up a new account for the outgoing server, do this for a new outgoing message setting Smtp.

choose to create a new account for this and sending your email s will work again in Thunderbird.

forcing a password

You can also choose to force the password for your existing account to your mail server, but your input field is apparently empty or there is a different password.

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you can also find the SMTP passwords if you go to Thunderbird Preferences)Security)Saved Passwords in Thunderbird software.

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