Thunderbird is a popular email program created by Mozilla who also make the Firefox web browser. It's free to use and has a similar interface to other email programs such as Microsoft Outlook. It also has to be configured with the incoming and outgoing server information from your Internet provider to be able to send and receive email. If you don't have your server settings configured correctly then you will not be able to send and receive email and will see errors in the program.

When trying to send mail using Mozilla Thunderbird you may get a message that says the following:

An error occurred sending mail: Unable to authenticate to SMTP server smtp.yourdomain.com. The server does not support any compatible secure authentication mechanism but you have chosen secure authentication. Try switching off secure authentication or contact your service provider.

This error can be caused if you have your SMTP (Simple Mail Transfer Protocol) server settings set to use secure authentication when your mail server does use secure authentication. Your ISP may or may not use secure authentication and there is no real way of knowing unless you contact them to find out or just change the setting and see if it fixes the problem. It is a simple process to change this setting and get your mail working again. To do so, click on Tools, Account Settings and then click on Outgoing Server (SMTP) on the bottom left of the window. Next click on your outgoing server in the list and click on Edit.

Finally uncheck the box that says Use secure authentication and click Ok then test Thunderbird by trying to send email again.

Pin It

Join Us On FaceBook

We Recommend:



Join Us On Twitter

Get insights into the computer industry and regular updates on our site. Click Here

OCT Youtube Channel

New tech tip videos posted on a regular basis. Subscribe today! Click Here

Sponsored

LATEST VIDEOS

Make your computer's name display correctly ever...

Dont limit yourself to booting from ISO files! ...

Use your computer as your phone!   When...

Overcome the VirtualBox 2TB Virutal Disk Limit! ...

Instantly give your VMs more hard drive space! ...

Freely copy files between your VirtualBox host a...

RECENT TIPS

What can you do to make your computer more safe?...

Make your computer's name display correctly ever...

Give the gift of security this season!   ...

Dont limit yourself to booting from ISO files! ...

Is using a proxy the right choice for you? &nbs...

Make learning a little bit easier with the...

NEWS

Another reason to keep your devices up to date. If you ...

Try not to get the BlueKeep Blues Once again the Micros...

Are Your Chrome Credentials Secure? Many people like to...

Windows 10 Optional Updates Coming Soon If you can reme...

Is a Virtual Private Network right for you? &nb...

Use Some Cache to Speed Up Chrome If you use the popula...