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Update uid_next if the server rewinded it

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fix #2188

Also, if we notice that the server started reusing old UIDs, _also_ do a `ResyncFolders`, because the server likely forgot to change uid_validity
This commit is contained in:
Hocuri
2021-03-11 16:11:24 +01:00
committed by link2xt
parent 04f816be31
commit 0de8b6a7e5
1 changed files with 9 additions and 0 deletions
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9
src/imap/mod.rs
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@@ -575,6 +575,15 @@ impl Imap {
// new messages is only one command, just as a SELECT command)
true
} else if let Some(uid_next) = mailbox.uid_next {
if uid_next < old_uid_next {
warn!(
context,
"The server illegally decreased the uid_next of folder {} from {} to {} without changing validity ({}), resyncing UIDs...",
folder, old_uid_next, uid_next, new_uid_validity,
);
set_uid_next(context, folder, uid_next).await?;
job::schedule_resync(context).await;
}
uid_next != old_uid_next // If uid_next changed, there are new emails
} else {
true // We have no uid_next and if in doubt, return true