為了改善您的使用體驗,本網站正在進行維護,部分功能暫時無法使用。若本站的文件無法解決您的問題,想要向社群發問的話,請到 Twitter 上的 @FirefoxSupport 或 Reddit 上的 /r/firefox 發問,我們的社群成員將很快會回覆您的疑問。

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

Can receive but not send emails and tried the help page hints already

  • 5 回覆
  • 1 有這個問題
  • 2 次檢視
  • 最近回覆由 user1121639

more options

Hi, I just switched from Apple Mail to Thunderbird and I with both my providers (a University Server for work-mail and a mail provider from Germany for private messages) I can receive but not send messages. I tried everything on the "cannot send messages" page https://support.mozilla.org/en-US/kb/cannot-send-message, it does not work.

I am using Mac OSx Sierra on a 2012 Macbook. Thanks for your help!

Hi, I just switched from Apple Mail to Thunderbird and I with both my providers (a University Server for work-mail and a mail provider from Germany for private messages) I can receive but not send messages. I tried everything on the "cannot send messages" page https://support.mozilla.org/en-US/kb/cannot-send-message, it does not work. I am using Mac OSx Sierra on a 2012 Macbook. Thanks for your help!

被選擇的解決方法

Those settings look good. It's rare that someone looking for help provides such useful info as you have with those screenshots. Awesome.

Cannot send mail has a bit more troubleshooting info.

Verify Thunderbird is in online mode, not offline mode: click "File -> Offline"; "Work Offline" should be unchecked.

Temporarily disable anti-virus & firewall and test sending.

Disable all Thunderbird add-ons, and test sending.

Beyond that, I am unable to help.

從原來的回覆中察看解決方案 👍 0

所有回覆 (5)

more options

Did you verify the SMTP server settings with the e-mail providers? SSL or not SSL, port numbers?

more options

Hi, thanks for helping me, I really appreciate it. I did check the server settings, but I'll attach some screenshots for you.

more options

選擇的解決方法

Those settings look good. It's rare that someone looking for help provides such useful info as you have with those screenshots. Awesome.

Cannot send mail has a bit more troubleshooting info.

Verify Thunderbird is in online mode, not offline mode: click "File -> Offline"; "Work Offline" should be unchecked.

Temporarily disable anti-virus & firewall and test sending.

Disable all Thunderbird add-ons, and test sending.

Beyond that, I am unable to help.

more options

Thanks Bruce, I think my problem is the Avast-Antivirus-Protection. I disabled it and now at least my Private Mailaccount works. Regarding my other Account I guess I'll just have to call the IT support at university. If you know any tricks regarding Avast and Thunderbird, I'll appreciate it!

more options

I am using Avast Pro Antivirus also, but am not having any problems with it and Thunderbird.

The article Antivirus software has some useful tips for using antivirus with Thunderbird.

The article Thunderbird:Testing:Antivirus Related Performance Issues has a section for Avast.

Avast Antivirus: Troubleshooting warnings about invalid mail server certificates when sending and receiving e-mails is also something that might help.