I already use combined backend + “DiffEngine” for a couple of year now to synchronize PIM data from a database + emails from IMAP.
It works great except for the RAM consumption. So, I’m planning to abandon the “DiffEngine” for something else. I can retrieve a list of changes since the last check for PIM data (from my database) and emails (from IMAP + MODSEQ).
Any help, hints would be really appreciated :)