How to Fix Cannot Send Messages in Thunderbird in a Hassle-Free Way

Thunderbird is a desktop-based email application that contains multiple features that are used professionally and personally by users all over the world. It is developed by Mozilla for sending and receiving emails. But there are times when there is an error i.e. unable to send mail messages in Mozilla Thunderbird.

This could occur because of various reasons. The reasons are running of anti-virus program, Thunderbird is in offline mode etc. While using Thunderbird a user is bound to face error which can be of many type one of them is cannot send messages in Thunderbird. We will understand the topic with the help of query:

“Hello! I have been using Thunderbird for a very long time but I have never faced problem with it. But recently while using Thunderbird I am unable to send messages. I am unable to understand why such a problem is occurring. Could someone tell me the way out as I will be grateful. Thanks”

“Hi! Recently I am unable to send messages from Thunderbird is because of some clash with some program like anti-virus or some other reason. Could anyone help me out. As I have some important messages that has to be sent. Thanks.”

Manual Method to Fix Sending Messages Failed in Thunderbird

The Manual Method involved to fix cannot send email messages in Thunderbird are:

Method-1: SMTP Settings needs to be checked

• To begin, start the Thunderbird application to remove email sending problem when Thunderbird Inbox is full.
• After that go to Tools followed by Account Settings.
• There is another way out click on three bars on top right-hand side, go to Option followed by Account Settings.
• Through Account Setting dialog box, choose SMTP. Then the user has to make sure for the email account configured, SMTP is correct.

• After that Click on Edit button in order to change SMTP details and remove the email problem.
• Further go to email provider’s website search for mail settings followed by SMTP.
• Match the documented settings and Thunderbird settings.

Method-2: To Verify correct SMTP Setting is used

• Start the Thunderbird application to fix Thunderbird won’t send messages.
• Afterward, Go to Tools followed by Account Settings.
• Or else click on three bars on the top right hand side further go to Option followed by Account Settings.
• Then, in Account Setting dialog box. The account name to be selected having Thunderbird email problem sending.

• Now verification to be done such that correct SMTP is used for the email address.

Method-3: Nothing is Blocking mails

1. By turning of anti-virus or firewall software, the user should try sending email again.
2. There will be the removal of Third-Party software as a reason for Thunderbird email sending problem.
3. There can be ISP issue which is resulting in the blocking of emails from port 25. Change in the port is required after consulting with the service provider.

Method-4: Resetting of SMTP Password

1. To begin with go to ISP site and reset a password.
2. After changing a password, add it to Thunderbird.

Limitations Of Manual Method

The limitation of the Manual Method are as follow:

• Technical knowledge Required: There is a requirement of help from the ISP providers to solve this cant send messages in Thunderbird error.
• A lot of Confusion: In the manual method the steps are too many which can confuse a non-technical person.
• No Guarantee: There is no guarantee that Thunderbird’s problem of message sending will end through Manual Method.
• Risk Involved: Email configuration and changes in the setting involves considerable risks while solving this unable to send Mail messages in Thunderbird issue.

Note: The methods to fix the “Thunderbird cannot send message” are over at this point. The section below is for those users who are fed up with Mozilla Thunderbird and have decided to switch to other email clients such as MS Outlook. Please do not mistake it for a way to solve the error within Thunderbird as it helps you to move all your data into Outlook.

What if Unable to Fix Cannot Send Messages in Thunderbird Error?

In order to solve ‘unable to send email messages in Thunderbird’ issue, one has to go through the provided manual methods. The last case is to reinstall Thunderbird and configure every email account after disabling the antivirus.

However, even if this is unable to fix the problem, users switch to other email platforms such as MS Outlook while leaving behind the error-prone Thunderbird app. To do so, a third-party conversion tool is required.

If you are among the users who have decided to move to Outlook, then use MBOX to PST converter. It is created in such a way to transfer all data of Thunderbird to multiple file formats. One can easily create PST files and access all the emails in MS Outlook. With this tool, a proper preview of the email file along with the attachment is also provided. The conversion of email takes place in bulk. There is no need of MS Outlook installation.

Steps to Use This Software:

1. Firstly, launch the software.
2. With manual selection add single or multiple MBOX file.
3. Choose the email application which is already installed on machine.
4. Then configure email, the software will fetch data from the default location.
5. By selecting file or folder system, MBOX file can be fetched by location known to the user.
6. After that Browse for MBOX file.
7. In order to select bulk MBOX file, use folder mode.
8. Email will load in preview Window, user can stop the process by clicking Stop button.
9. After that select the “Export All Folder” in order to export all MBOX file at a time.
10. In order to export MBOX file, file type to be selected.
11. Destination location to be selected and click OK.
12. In order to start export process, click on Export.
13. Once the export process is complete, report will be generated.
14. By clicking the Open location, converted file can be directly accessed.

Conclusion

Regardless of what email client is being used, the user wants that client to function well. If desktop-based email client like Thunderbird is not functioning well, it can lead to a lot of problems for users. We discussed one such issue with Thunderbird that can distort the daily work life of its user.

The reasons can be many such as an anti-virus program is running or Thunderbird is in offline mode etc. There are many manual methods given in order to counter the problem of “cannot send messages in Thunderbird.” Other than that there is a third-Party tool that helps in importing Thunderbird to Outlook in case the user is fed up of Thunderbird and its issues.