MIgration to stalwart mail server

[posbg]

I am planning migration of old mail server based on Dovecot, postfix, etc.
Testing instalation is with default RocksDB
Following documentation I've successfully imported several accounts from dovecot IMAP using

stalwart-cli import messages -f maildir-nested...

but because migration process will take longer I need several execution of import per mailboxes until finaly switch to new mail server. As result mails was imported as duplicates and more.

It is written that If the import process is interrupted, the CLI tool supports automatically resuming the task without duplicating messages or folders. How this can be valid for successfully finished imports also, or how to proceed in this situation?

Thank you!

[mdecimus]

Can you try migrating those mailboxes using imapsync instead?

[posbg]

Thank you!
Sure, but I like how fast it was done using stalwart-cli, realy!
Any chance to use Sieve Email Filtering: Detecting Duplicate Deliveries ?

[mdecimus]

What do you mean with Sieve Email Filtering: Detecting Duplicate Deliveries ?

[posbg]

I was thinking about the combination of several imports and Sieve script Detecting Duplicate Deliveries....