Yes, that is how I would have it. I've seen other references to the way you had it before, but I think this way is more specific (the wiki page on DNS shows it the same way I have suggested). Not sure if it will fix your problems, but it's worth a shot. Remember to also check your system logs after you restart DNS.Quote:
; Addresses and other host information.
@ IN SOA mail.forexmgr.com. hostmaster.mail.forexmgr.com. (
10118 ; Serial
43200 ; Refresh
3600 ; Retry
3600000 ; Expire
2592000 ) ; Minimum
; Define the nameservers and the mail servers
IN NS 192.168.1.15
mail A 192.168.1.15
IN MX 10 mail.forexmgr.com.