Moving MX not working?

Hey guys,

I've searched around but for some reason i cant seem to find the correct answer for this question (Maybe not searching properly)

I have a client who owns domain.co.za - This domain is hosted on our server but they are hosting mail onsite to a static address: I did the following in the DNS Functions (Edit DNS Zone) under WHM -->

For this regard i changed the normal MX Entry in the DNS zone on WHM to

domain.co.za. IN MX 0 196.30.124.164.

For some reason this doesnt seem to be working very well. (Sporadically or something like that) and when i send them email they are not getting it...

I figured that their IT guy would also need mail.domain.co.za to point they also need mail.luma.co.za to point to their server so that they can work from there sooo i did the following:

mail 14400 IN CNAME 196.30.124.164.

Does any1 know if i'm doing something wrong or if their IT guy is doing something wrong?
Thanks

Wzd

 

Thanks chirpy, yeah i read up about FQDN and so forth. Seems that most mailservers dont like MX with IP's set

Anyways stupid mistake, (pebkac)
Thanks again