Lloyd Zusman writes:
One of the domains that I host is for a user whose machine gets a dynamic IP address. Therefore, the "A" record in the DNS entry for that domain changes from time to time.I handle this user's email with my Courier server, and I'm wondering if I need to do a "courier restart" every time his DNS changes. The "MX" record (which, of course, points to my Courier server) remains the same, but will the change of his "A" record require me to restart Courier, for any reason?
Courier does not cache DNS data itself. A DNS request is made for each message to a new domain. You only need to deal with caching in your DNS server.
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