Alternatives for outbound email service

[me-5yx05kfkO/aqeI1yJSURBw at public.gmane.org (Matthew Gillen)]

On 09/26/2010 03:30 PM, Rich Braun wrote:
> For several years (since Comcast started blocking port 25), I've been using a
> particular company's SMTP relay service for my personal mail.
>
> Lately I'd say 30% of my outbound messages are getting trapped by spam
> filters, for reasons that I can only guess.  One possibility is that my
> outbound messages contain several Received headers, at least one of which
> identifies my dynamic Comcast IP.
>
> I still want to run my own Postfix or exim server but I think I need to
> redesign this so I better control over the reputation of my outbound service.
>
> Are any of y'all still running your own mail server?  Is there any inexpensive
> way to accomplish this, as an alternative to the now-failing DynDNS MailHop
> Outbound?  Or do I throw in the towel and set up a Gmail account?

Have you set up the SPF record for your domain to include the particular 
company's relay?  If the DNS isn't simple (ie this is mail from a 
domain, and it's coming from that domain), then a lot of sites will 
classify it as spam unless the SPF record says that it's okay that this 
email is coming from some other machine.

http://www.openspf.org/

Matt