Topic: dyndns.org problem

[welsh]

I used custom DNS from Dyndns.org. I have change the script of /dynamic-dns/dyndns.org from "system" to "custom" and have following setting in Dyndns.org:
mydomain.com          A   123.123.123.123
mail.mydomain.com   A   987.987.987.987
mydomain.com          MX   10   mail.mydomain.com.
www.mydomain.com  CNAME   mydomain.com.
ftp.mydomain.com     CNAME   mydomain.com.

It seems no problem to update mydomain.com data but fail to update mail.mydomain.com A record.

Please help.