Our reasoning is to reduce the time taken for DNS lookups
Most of the delay of DNS queries is DNS server to internet, not mail server to DNS.
and hopefully eliminate DNS timeouts that may occur.
If your DNS is already on the same LAN as the mail server, the timeouts aren't between the mail server and DNS.
very smoothly. I just wanted to know if those of you with a really deep technical knowledge had any problems with this type of set up or if there are pitfalls to such an arrangement.
If it works, it works. But putting the DNS on the mail server won't fix what you want to fix, which probably isn't fixable. DNS timeouts due to long response times are mostly temporary and not an impediment to mail.
A DNS delay of under 500 ms (and less than 10 ms from DNS cache) is insignificant in msg delivery time of 5 to 15 or more seconds.
Len
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