Q: Do i have to make a resync?

A: Short answer: No. Long answer: Read on:

No, that is not mandatory. However, we recommend doing so to prevent losing incoming mails. Lets say you do a migration, then you switch you provider or domain. Meanwhile there is a possibility that emails are still coming in. After switching, a resync can transfer those messages to the new account, so no message gets lost.

We strongly recommend doing a resync some days after the initial migration (After switching your DNS settings if you plan so)


This is the help and doc page for email-migration.io

Here you can e.g. read the manual, get help e.g. for the Email migration extension for Plesk

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