Thunderbird không nhận được mail

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 lớn Thunderbird version 78?

If your existing configuration suddenly stopped working after updating lớn Thunderbird 78, it might be your Antivirus or Firewall blocking the new version, or your email provider using outdated TLS security protocols.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 thư điện tử settings Look for an SMTP mail settings article on the mail provider"s site. This is usually in the tư vấn section of their website; searching for "mail settings" or "SMTP" will usually find it. Kiểm tra that your Thunderbird settings match the documented settings.

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

Verify that your outgoing e-mail is not being blocked

Verify that your outgoing thư điện tử is not being blocked by your firewall, antivirus software or your internet Service Provider:

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

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

Thunderbird 78 expects higher security standards for the so-called TLS network encryption protocol. If your provider does not tư vấn the newer versions of the protocol, sending & 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 & instructions here:

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

Delete SMTP Password

Try deleting your SMTP password. However, don"t bởi 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 thư điện tử password" form on your ISP"s baovetiengiang.com website.

If this menu doesn"t help

Please create a new tư vấn 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 & version (if any), operating system & version (for example Windows 7 or Mac OS X Mavericks), & Thunderbird version (for example Thunderbird 38.2.0). See the How bởi I create a screenshot of my problem? article for information on how to create a screenshot.

More resources

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