If it is still slow, try the next options:ĭisabling the AeroGlass interface makes the interface reacting much faster. The following steps helped me to speedup Thunderbird so that it got usable again.Įdit Thunderbird options under Preferences → Advanced → General tab, click on "Advanced options" button and set these values:Īnd restart Thunderbird. No other applications on my System were slow and the notebook has afast harddisk and SSD, so this was not the problem. Sometimes I could see the chars appearing slowly on the screen while I typed the email or it was impossible to drag & drop a email to a different folder because Thunderbird was stalled for 10-15 seconds. Such a filter could block or even delete the emails addressed to you preventing them from landing in your inbox.I've experienced that Thunderbird has gotten slower and slower on my Laptop, at last it was nearly unusable. Contact your ISP and check if they set up a spam filter. If you have problems receiving emails, check if everything is up and running on your ISP’s end. Switch to another port or contact your ISP for further help if you still can’t send emails. Some Internet Service Providers tend to block outgoing emails on certain ports (port 25). You can find the list of previous Thunderbird versions on Mozilla’s support page. The problem is that you won’t be able to send or receive emails if your provider does not support the latest TLS network encryption protocols.Īs a workaround, you can rollback Thunderbird. Thunderbird 78 and higher require enhanced TLS security standards. Save the changes and restart your computer.Use the slider to disable SSL/TLS protocol filtering.
Select Server settings and make sure you’re using the correct IMAP Server settings.įor more information on the IMAP settings to use, go to the official webpage of your email account provider.Click on the three-lines to open the menu.If you’re using a different email service, go to your mail provider’s website and search for the SMTP mail settings to use.If you don’t know what SMTP settings to use, check Thunderbird’s support pages: Check the SMTP server settings for your email address.Launch Thunderbird and click on the menu.That’s why you need to make sure you’re using the correct SMTP server settings.Įnsure you’re not trying to send emails from Thunderbird using the SMTP server of another email service. Not using the correct SMTP settings may prevent you from sending emails using Thunderbird. The server then distributes them to the recipients. In other words, the emails you send are first collected by the SMTP server. The SMTP server (Simple Mail Transfer Protocol) plays the role of the mailman in the email world.
Use this method if you can’t send emails. Cannot Send or Receive Emails on Thunderbird Check Your SMTP Server Settings