Thunderbird không nhận được mail

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If you cannot send messages, this page provides a series of steps you can follow to check for common problems. If you have problems receiving messages, see Cannot receive messages.

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The problem suddenly started after updating to Thunderbird version 78?

If your existing configuration suddenly stopped working after updating to Thunderbird 78, it might be your Antivirus or Firewall blocking the new version, or your email provider using outdated TLS security protocols. See these sections below:

Verify your SMTP outgoing email settings Look for an SMTP mail settings article on the mail provider"s site. This is usually in the section of their website; searching for "mail settings" or "SMTP" will usually find it. Check that your Thunderbird settings match the documented settings.

Verify the correct SMTP Server is being used In the Thunderbird menu bar, click the ToolsEdit menu and select Account Settings, or click the Application menu button and select OptionsPreferences and Account Settings from the sub-menu, and select the account name. Verify that you are using the right SMTP server for the email address. Most of the time you cannot send messages from one account provider using another account provider"s service. For example, you cannot send a mail from "joe" through Yahoo"s SMTP server.

Verify that your outgoing email is not being blocked

Verify that your outgoing email is not being blocked by your firewall, antivirus software or your Internet Service Provider:

Try briefly turning both antivirus and firewall software off, sending a test email, and turning them on and sending another test email.

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Note: Firewall or antivirus software blocking outgoing email is a common cause of not being able to send messages after updating Thunderbird, since it may be set to trust the previous version of Thunderbird and no longer recognize the updated version as trusted. Remove Thunderbird from your program"s list of trusted or recognized programs, then add it back manually or when prompted to resolve this.
Many ISPs block outgoing email on port 25. You may have to switch to another port (e.g. 587 or 465). Contact your ISP"s to see if they are blocking your outgoing email port.Verify that your mail server jdomain.vns the minimum version of TLS

Thunderbird 78 expects higher security standards for the so-called TLS network encryption protocol. If your provider does not the newer versions of the protocol, sending and receiving of messages may fail. You can temporarily lower the bar to check if this is the reason for your problem (which obviously reduces security, so it"s not recommended). More details and instructions here:

Thunderbird 78 FAQ - After upgrading to Thunderbird 78, I cannot get or send email messages

Delete SMTP Password

Try deleting your SMTP password. However, don"t do this as a first step, especially if you cannot send messages after updating Thunderbird while you previously could. In such case, usually there is nothing wrong with a stored SMTP password in Thunderbird (see above).

Reset SMTP Password

Try changing your SMTP password. This is usually done via a "reset email password" form on your ISP"s website.

If this list doesn"t help

Please create a new request with a screenshot of your SMTP settings with your user id obscured, and include the following information: your mail provider (for example, Gmail), ISP (for example, Comcast), firewall version (if any), antivirus software and version (if any), operating system and version (for example Windows 7 or Mac OS X Mavericks), and Thunderbird version (for example Thunderbird 38.2.0). See the How do I create a screenshot of my problem? article for information on how to create a screenshot.

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