[ale] comcast business + mail server = static ip?

[Scott Plante]

I seem to recall a lot of mail servers will block your mail as spam if the dns record is <86400 (24hr). Also there are lists of dynamic ranges that your address may be in and cause your mail to be blocked. Not having a reverse DNS entry will also cause some of your email to be blocked as spam. This is all for outgoing mail, so you may be able to get around it by routing all your outgoing mail through the Comcast SMTP server, but y ou probably want to get the static IP or use a mail host. 


Scott 
----- Original Message -----

From: "Robert" <rs at ale.spam.futz.org> 
To: ale at ale.org 
Sent: Wednesday, August 1, 2012 12:09:42 PM 
Subject: [ale] comcast business + mail server = static ip? 

I've just had comcast business class installed, and I want to move my 
mailserver over to it. However, I'm being cheap and trying not to pay the 
extra $15/mo for a static ip. I think I've read that their dhcp addresses 
rarely change.. I can monitor it, and use dns update to tweak my ip if it 
changes... with a 4hour ttl, I don't expect to miss much, if any, mail if the 
ip changes.. 

what concerns me more is that the reverse dns will be comcast's 
c-x-x-x-x.hsd1.ga.comcast.net... I know that technically reverse dns doesn't 
have to match the mail server's name, but some other servers might be too 
picky about it.. so I was wondering if anyone with comcast business class is 
running a mailserver using their assigned dhcp address? If so, have you had 
any issues? 

Robert 
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