MX Records & SPF

[#1]

I have set up my own mail server and have things working ok, it sends and receives, so the basic mx record in domain martek-net.co.uk is ok.
I have set up an A record for mail.martek-net.co.uk to point to my home machine.
I have set up a MX record with a lower priority than the force9 mail sever and pointing to mail.martek-net.co.uk
so far so good it all works.
But when I try to enter a MX record that has a TXT addition to be used by SPF enabled mail servers the syntax is rejected.
I need to be able to enter this as I am getting hundreds of back scatter spam emails, if I am getting them then others will be receiving emails that have spoofed from addresses and this will lead to my domain becoming blacklisted, NOT a good thing to ensure people can receive emails that I have really sent. SPF is becoming widely used is there anyway that TXT fields can be added via DNS admin. Any advice would be helpful.

[#2]

We don't support TXT records. If you want to add them then you'll need to host your domain elsewhere.

[#3]

Has there been any change regarding Plusnet support for TXT/SPF?

[#4]

Nothing has been announced so I assume the answer is "no".
It's likely to be Monday before a staff member will be around to confirm this.

[#5]

Quote from: grovep

Has there been any change regarding Plusnet support for TXT/SPF?

Nope, the situation remains the same I'm afraid.

[#6]

Most mail servers have a smtp relay option which you could use. Send grid.com is a free smtp service which I have had to use to enable me to send enable to certain hosts such as hotmail, otherwise it gets rejected.