What to do with /opt/stalwart-mail/export after upgrade to 0.10?

[ErwinSt]

Hello everyone,

This is probably a silly question, but what do I do with the contents of /opt/stalwart-mail/export after an upgrade that went well, can I delete it?

[enaut]

I always keep it but it was just for backup in case of a failed migration. So it "should" be safe to delete.