[accoil]

I get something like that in the initial IMAP sync. Some of my old emails will surface to the top with the current date as today. Never really bothered looking into as it only happens once, but I've been assuming that the date header on those emails were missing.

[1718627440]

Yes, I also had that problem and this is exactly the cause. When you resync the mailbox later it gets redated again. It is actually really stupid, because there are only TWO mandatory headers: Date and From. Getting this wrong seams to be really incompetent of the sender software.

[markasoftware]

i see, this likely happened to me.