I have a postfix MTA with dovecot for pop3/imap etc.. The server's RTC is horrible and is about 10 min fast every month, but this is an annoyance when dealing with logs and because people rely on timestamps in email. I've dealt with this for the last two years using ntp, but I just noticed it stopped working about 3 months ago.
I know that if I move back the time, I'll cause this failure on dovecot. What's the quickest way to come back from that problem? I've seen tons of mentions in google searches about it, and the closest I've found is to restart the server, which I'm trying to avoid (It's an old POS, there's no money here to put into a mailserver)