Open the SMTP server settings and make sure that Thunderbird is set to use OAuth2 authentication for the GMail server.

Ok, I finally figured out what the problem was. It's Gmail's 2-Step Verification. I turned it off and now Thunderbird is accepting my password.

Login to the Mozilla Thunderbird account; Go to Tools and select Accounts Settings ; Click on the email address and check the username & email address; Make sure ...

Incoming Server: imap.gmail.com. Port: 993; SSL: SSL/TLS; Authentication: Normal Password; Username: [email protected] · Outgoing Server: ...

Sending of password did not succeed. Mail server pop.gmail.com responded: Username and password not accepted. And this for smtp: Login to server smtp.gmail.com ...

"Sending of message failed. An error occurred sending mail: Unable to establish a secure link with SMTP server smtp.gmail.com using STARTTLS ...

Server Name: smtp.gn.apc.org; Port: 587; Connection security: STARTTLS; Authentication method: Normal Password; User Name: Your GreenNet username (the part of ...

Select the Outgoing Server (SMTP) section in the left bar, click on your email address and click Edit. 8. In the Authentication Method dropdown menu, select ...

How to set up an outgoing SMTP email server for Thunderbird. ... though: if you rely on a common outgoing mail server like Gmail's or Yahoo's and plan to ...

Login to server smtp.office365.com with username *** Email address is removed for privacy *** failed. I know it can not be the password, it is correct.

Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) smtp.gmail.com. Please check the password and verify the ...

Causes of the Thunderbird “Connection to Server Timed Out” Error · Incorrect account configuration (SMTP port) settings · Email blockage due to ...

Use the following server settings: Incoming: IMAP, imap.gmail.com, Port 993, set SSL to SSL/TLS, and set authentication to OAuth2; Outgoing ...

Thunderbird IMAP problems usually occur due to the configuration of the IMAP server (such as Courier-IMAP), which may be configured to only ...

Select Email account, and then click Next. Enter your name and e-mail address. Select POP or IMAP as the type of incoming server you are using. Your ...

Fix Common Gmail Pop3 Errors · Repeatedly prompted for your username and password or 'invalid credentials' error. · The connection to the server has failed. · The ...

How to Fix “login to server imap.googlemail.com failed” for Mozilla Thunderbird using Google Mail IMAP · login to your Gmail account (don't know ...

Login to server imap.gmail.com failed. ... I was notified by google that someone had my password and tried to log into my gmail account from out ...

For example, you cannot send a mail from “[email protected]” through Yahoo's SMTP server. SMTP Login Failure. Verify that your outgoing email is not ...

Incoming Mail (IMAP) Server · IMAP Server: imap.gmail.com · Port: 993 · Require SSL: Yes · Username: Your Gmail email address · Password: Your Gmail ...

Mozilla Thunderbird may not be able to establish an SSL connection to the Gmail server through the IMAP protocol if a Kaspersky application ...

Server hostname: smtp.gmail.com; Port: 587; SSL: STARTTLS; Authentication: Normal Password. VERY IMPORTANT: Enter your [email protected] in both Username ...

Incoming server hostname:imap.gmail.com · Incoming Port: 993 · Incoming SSL: SSL/TLS · Incoming Authentication: Normal password · Outgoing server hostname: smtp.