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Sorry if I overlooked something, but I did not find the answer to my question. What happens if I do frequent backups and nothing has changed on the server ? Thanks a lot Norbert |
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Answered by
joeyates
Jul 30, 2025
Replies: 1 comment
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Hi @nklamann imap-backup depends on the IMAP standard. An IMAP server identifies folders with a name plus a unique id ( When a backup is run, it stores those names and ids. With each following backup, it checks what's missing, based on previously seen names and ids, and downloads what is new. |
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joeyates
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Hi @nklamann
imap-backup depends on the IMAP standard. An IMAP server identifies folders with a name plus a unique id (
uid_validity), and the emails in those folders with ids (uid).When a backup is run, it stores those names and ids. With each following backup, it checks what's missing, based on previously seen names and ids, and downloads what is new.