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Mozilla Thunderbird is an open-source application that assists users with efficient management of their emails, newsfeeds, chats, and newsgroups. Despite the simplicity and efficiency of Thunderbird, users also face some common email problems due to the inability to open up or unable to send emails.
Here, we will discuss one among such issues – Thunderbird SMTP Error – Cannot Send Messages.
Sometimes while using Mozilla Thunderbird users have encountered issues in sending messages. SMTP server error or Thunderbird email not responding is the main reason behind this problem.
To send and receive an email, SMTP an internet standard is used by mail servers. With the help of the SMTP error message, one can understand the problem behind the message wasn’t sent successfully. And one can check the bounce error message to diagnose the bouncing incoming and outgoing message problem.
Once in a while, the issue is fine, but what if you’re constantly facing Thunderbird issues? it’s high time you check out for solutions.
While using the Thunderbird email client, there are some issues faced by users. To solve the issue, follow the steps below-
Start the search for SMTP mail settings, if the user’s mail setting couldn’t be found.
Follow the steps given below to check your SMTP.
By following the above steps, you will be able to check whether you are using the correct SMTP.
In this solution, one has to verify that your outgoing email is not being blocked by your firewall, antivirus, or your Internet Service Provider. For this, follow the given steps-
For TLS network encryption protocol, Thunderbird 78 is looking for a higher security standard. In case the newer version of the protocols is not supported by the provider, sending and receiving messages may fail. So update the Mozilla Thunderbird application to the latest version
Try deleting your SMTP password.
Note: However, don’t do this as a first step, especially if you cannot send messages after updating Thunderbird. In such a case, usually, there is nothing wrong with a stored SMTP password in Thunderbird.
Now configure the email account and try to send an email again; this can resolve the Thunderbird email not sending issue.
Otherwise, Just change your SMTP password by using a ‘reset email password’ from your ISP’s support website.
If the above solution list doesn’t help, we will highly recommend Kernel for MBOX to PST. This helps users to switch to another email client like Outlook for a better emailing experience.
Outlook helps to manage all your accounts from one application without signing up for a new array of services and new accounts. It can easily connect all your email accounts. It implies that one can search, manage emails, and apply other email features across all accounts without using any complicated filters.
The tool easily runs on all MS Outlook versions (2019, 2016, 2013, 2010, 2007, and 2003). This also moves your total emails of Apple Mail to Outlook PST files with complete accuracy, retaining the original formatting, structure, and properties.
If you want more of such powerful professional tools, you can checkout our Kernel Website for more such certified tools, which supports backup apple mail data to iCloud and a lot more.
It can be annoying to MBOX users when the Message Cannot Send issue persists. Even though this issue can be easily fixed, some users may like to switch to Outlook. One can switch to Outlook from Thunderbird using the MBOX to Outlook PST tool. It supports multiple MBOX files from various clients for conversion and easily converts all emails and attachments to PST, DBX, MSG, and EML and it also works over export thunderbird emails to Gmail without causing any disturbance to the original Meta properties. If you need some more Thunderbird troubleshooting assistance, then stay tuned for our upcoming troubleshoot articles.
Excellent guide to fix thunderbird SMTP error, cannot send messages. It’s really helpful for me. I am also thankful to the customer support team also.
Well written blog. It proved very helpful to me and I think everyone, how is facing this problem can get benefits from this. Thank you again for your guidance and suggestions.