Imports Duplicate Messages

Question

Imports Duplicate Messages

GrumpyMailImporter opened this issue a year ago · comments

It seems like this tool imports duplicate messages? If a message already exists in the account and in the mbox file, the message is imported anyways. Does it do any checks on the destination account when importing?

Liron Newman · Answer 1 · Wed Mar 01 2023 19:07:14 GMT+0800 (China Standard Time)

The tool itself doesn't check for duplicates, but Gmail does. If you import the same message twice, Gmail would ignore the second one (just merge the labels from the two, if needed).

If you're seeing the same message twice after importing, verify that it doesn't appear twice in the source .mbox files. If you verified it, see if the message is missing a Message-ID header - that could cause Gmail to not be able to de-duplicate messages.

I hope this will help resolve the grumpiness! :)

GrumpyMailImporter · Answer 2 · Wed Mar 01 2023 21:25:27 GMT+0800 (China Standard Time)

Thanks for the info. So if a message already exists in the account and is also included in the mbox file, would Gmail delete the duplicate message after it is imported from the mbox file?

Liron Newman · Answer 3 · Wed Mar 01 2023 22:02:03 GMT+0800 (China Standard Time)

It doesn't really delete it - it simply doesn't import it. The source mbox file is not changed either, of course.