Google Apps - issue with emails from own mail server

[rhonda427]

I have a domain where I have setup the MX records according to Googles instructions to point to Google Apps:

Priority Points to
1 ASPMX.L.GOOGLE.COM.
5 ALT1.ASPMX.L.GOOGLE.COM.
5 ALT2.ASPMX.L.GOOGLE.COM.
10 ASPMX2.GOOGLEMAIL.COM.
10 ASPMX3.GOOGLEMAIL.COM.

This works fine for all emails coming from "outside"

But all emails being sent from a mailserver located at the ip-address being pointed to be the domains A-records, does not come through. The webserver works fine, but I am in doubt about whether my a-records might be incorrectly set up, and this might explain the issue:

Host IPTTL
localhost.mydomain.com127.0.0.143200
mydomain.com195.63.29.85 (fictive)43200
mydomain.com195.63.29.85 (fictive)43200

If this is correct, what could possibly cause this behaviour?

[phranque]

do you have an SPF record?

[rhonda427]

My registrar has not yet implemented an SPF-record, and refers to the TXT record to do so. The TXT record currently only holds a validation code used to validate owership to Google. Nothing else.

I guess I could just remove the Google code now, but would that make any difference?