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To set up SPF for an OpenEMM server ( for the site:

web server:
EMM server: (say, ip:

The domain is registered by an outside supplier. What should I tell the supplier to set the TXT record?

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up vote 1 down vote accepted

Depents on what you want. If email from anything else than your MX server needs to be dropped, this will suffice:

v=spf1 mx -all

More examples can be found on Wikipedia

And an answer based on the comments below:

v=spf1 mx ip4: -all

share|improve this answer, as a new server, will send emails directly from it's server by sendmail. – ohho Jan 28 '13 at 10:16
and is that also the incoming mailserver (MX record in DNS)? – Dennis Kaarsemaker Jan 28 '13 at 10:42
no, mx is – ohho Jan 28 '13 at 10:45
ok, updated answer – Dennis Kaarsemaker Jan 28 '13 at 10:48
Yes, that would work too. Wikipedia doesn't make that clear, but does. – Dennis Kaarsemaker Jan 28 '13 at 10:57

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