Reverse DNS and Email

[Ram_Argid]

I've tried searching through the forums to see how others are handling the junk folder/spam issue of reverse DNS. I found this thread and it seems to outline the general thoughts on this issue, but not in regard to email: http://forum.vortechhosting.com/showthread.php?t=5989

Is there a way to overcome the reverse DNS issue as it applies to email spam filters and the like? Is there a way to (for instance) use TXT records to overcome the issue (for those services that look at them anyway)?

I realize that ALL email IP's are shared and therefore reversing back to them is a moot point, however, there must be a way around the email getting nailed for spam/junk (even though it is a small percentile).

[Altair]

I'm not sure about this, but what I think you are saying is...

Right now if you setup mail.domain.com and then do a reverse on the IP address, it comes back with mail[server-number].hsphere.cc.

You want to know if you can show that mail is coming from mail.domain.com rather than hsphere.cc. Is that correct?

If that is the case, I am not sure. Have you contacted Vortech on this?

[Ram_Argid]

No. The first part is correct, the second part I'm pretty sure isn't possible since ALL ip's for email are shared.

What I want to know is if there is a solution for this. Such as using txt records as denoted here: http://www.openspf.org/

Any solution to this would be welcome however.

I was hoping to perhaps get both Vortech and others input on this all at once.

[mresell]

I think that resellers here would like some info on spf. I have seen it stated that vt is using it. I don't think everyone is particularly clear on the ramifications of trying to use it with the forwarding etc....

[Brangwyn]

The mailservers here all have valid PTR/RDNS that is

http://www.dnsstuff.com/tools/ptr.ch?ip=216.157.145.20

So I don't see any problem there, when someone goes to send mail to that server, it would answer as mail.hsphere.cc and has a valid RDNS entry for mail.hsphere.cc so there shouldn't be any issues with RDNS afaik.

SPF Records (doesn't HSphere have them built in now?) but yes, they are just plain TXT records, you can create a simple valid SPF record like "v=spf1 a mx ~all" which should be acceptable to any mailserver actually verifying SPF (not a heck of a lot of them seem to care about SPF anyway).