[plug] cannot send mail to certain domains

[Carl Gherardi]

> Feb  1 11:28:15 mmtlnx postfix/smtp[31353]: EA83736CEB:
> to=<maria_louisedking at yahoo.com>, relay=none, delay=7749, status=deferred
> (Host or domain name not found. Name service error for name=yahoo.com
> type=MX: Host not found, try again)
>
>
>
> What I’m trying to find out, is this DNS or rDNS related.

Is this happening for all domains?

I assume mx lookup for yahoo.com actually works.

I have had issues with udp only dns lookups for larger domains, and
had to allow tcp connections. The working theory was that the size of
the response exceeded what a single packet udp allowed.

HTH

Carl G