How Can I Back Up IMAP Emails Without Losing Folder Structure or Attachments?

[steveenmiller07]

I have been looking for a reliable way to back up my IMAP emails because I want to maintain a separate copy of important business and personal conversations. Most email providers allow users to access messages online, but I am concerned about losing access to older emails if an account is suspended, a server encounters problems, or I decide to switch email providers.

I understand that IMAP synchronizes emails across devices, but does synchronization alone provide a reliable backup? If an email is accidentally deleted from one device or the server, it may also disappear from other connected devices.

I would like to understand the best approach to back up IMAP emails locally while keeping the original folder hierarchy, message headers, timestamps, and attachments intact.

A few things I am particularly interested in:

• What is the easiest way to create a complete IMAP email backup?
• Can I save IMAP emails in PST, MBOX, EML, or PDF formats for future access?
• Is it possible to back up selected folders instead of downloading an entire mailbox?
• How should users handle large IMAP mailboxes containing thousands of messages and attachments?
• What precautions should be taken when backing up multiple IMAP accounts?

While researching different approaches, I came across the SysInfo IMAP Backup Tool, which offers multiple export formats, folder selection, date-based filtering, duplicate removal, and batch processing through CSV. These options seem useful for users managing multiple mailboxes or maintaining long-term email archives.

However, I would also like to hear about practical experiences from people who regularly manage IMAP accounts.