There are following issues faced by users who have large mailboxes and using Thunderbird email application: Some Problems Faced Due to Thunderbird Maximum Literal Size Exceeded Anti-virus or firewall has deleted or isolated Thunderbird storage files.When some corruption happens in the Thunderbird MBOX files.When a problem with Windows operating system and Thunderbird v3.1.Thunderbird mailbox folders cannot exceed the 4GB limit, so this issue arises.When UID max mailbox size exceeded error message arises due to limited mailbox space.Using an abandoned Thunderbird account that has not been cleaned over years.The recipient has a large amount of emails and the server is not accepting any more.There are many reasons that lead the maximum request size exceeded issue in Thunderbird. Reasons Behind Why Does Thunderbird Maximum Request Size Exceeded Follow this article to figure out the best solution to resolve the error when Thunderbird maximum request size exceeded.

Therefore, to get solution on how to Increase Mailbox Size in Thunderbird, there are several resolution methods are discussed in this post. In that case, they will get an error message “Thunderbird error message size exceeded”. But, sometimes users face challenges in reading, sending and receiving daily emails because of a shortage of space. It provides lots of great features such as customizable views, quick message search, support for IMAP and POP3, RSS support and many more. Thunderbird is a free and open-source cross-platform email application provided by Mozilla, which is used to create, send and receive emails through IMAP and POP3 accounts. Modified: Septem| Email Tips, Mozilla Thunderbird, MS Outlook | 5 Minutes Reading

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