Cannot get onupdate to work reliably

I was under the assumption that on client.onupdate would be called when e.g a mail is changed on the server. this does work with the gmail server but quite time delayed and it does not work e.g with a standard mail server from hetzner. onupdate is basically never called for e.g flag changes or very intermittently at least.

From the documentation I assume I have to first call client.selectMailbox with condstore:true to even hope to get it working correctly. If it doesnt work with the non Gmail servers I test against, does that mean that the servers dont behave correctly ? Does anybody know how widely supported this quicksync (https://tools.ietf.org/html/rfc7162) feature is ?

Is anybody using this ?

[andris9]

Yeah, propagating flag changes in a large email system is really complicated, it took Gmail literally years to start sending these notifications at all. If condstore is enabled then you can use the changedSince modifier - you need to keep count of the last seen mailbox.highestModseq or message.modseq and provide this value to listMessages

client.listMessages('INBOX', '1:*', ['uid', 'flags', 'modseq'], {
    changedSince: lastKnownHighestModseq
}).then((messages) => {
    messages.forEach((message) => console.log('Flags for ' + message.uid + ': ' + message.flags.join(', ')));
});

[matthiasg]

Thanks.

Since I can detect the capability I can notify users of the potential delay or polling mechanics. At least it works with gmail. Will be interesting to see whether microsoft exchange supports that, but I cannot test against our servers because SSL wont work until I get custom certs to be accepted.