MAXCONVERTMESSAGES — MAXCONVERTMESSAGES

The IMAP server’s CONVERT extension was asked to handle too many messages or parts at once, exceeding its limit. This is a specialized case (CONVERT is used for on-the-fly format conversions). If you somehow invoked this (likely not by default in Riposte), break down the conversion request into smaller chunks. Process fewer messages or parts per CONVERT call. In normal usage, you likely won't hit this, so no action unless you're dealing with conversion queries.