On 7/22/2010 12:59 PM, Karsten Bräckelmann wrote:
On Thu, 2010-07-22 at 12:45 -0700, Ted Mittelstaedt wrote:
A lot of people have gotten home mailservers running on so-called
"dynamic" IP addresses - when they have discovered that Comca$t will
continually approve DHCP re-lease requests for the same IP address.
Often people can go for 4-6 months at a time with the same
"dynamic" IP address if the gear is on a UPS
Just setup your stuff, get an IP number, then query DNS and see
what the PTR record for the IP address is, then name your server
the same as that PTR name, and in DNS setup that name as an MX
host.
If the IP changes then modify the hostname to the new PTR name and
modify the MX in DNS and restart the mail process on the mailserver.
Whee, dyndns sounds far easier than that fragile hack.
Of course you can do the dydns.org route but then your PTR will
not match the hostname and some servers out there will not accept
mail from you if that is the case.
Wait, did you just say local SMTP delivering directly?
Yes.
Comcast dial-up
dynamic end-user space is NOT listed on PBL?
My experience is that it isn't. I'm sure they have SOME of it's
"dynamic" space but Comca$t seems to assign static IP's for comcast
at work customers right out of the same netblocks.
Sure, you can relay outbound smtp through comcast's mailserver - if they
allow it. Do they? I know Verizon doesn't allow outbound
mail to be relayed through it's server unless it's a @verizon.net address.
I can only report what I've seen - I don't use comca$t myself and I
don't have a lot of direct experience with it.
I believe we where not talking about outgoing SMTP.
I know, but you advised running your own mailserver (good advice)
and doing your own outbound mail is part of the process IMHO.
That unrelated
setting can stay unchanged in the MUAs. The address appears to be
handled by Comcast anyway, so the SMTP would not be an MX. And from my
understanding, it is unlikely Neil has control over the domain's DNS.
If I would run an SMTP on dynamic space, I'd have it relay via my ISP's
SMTP. Or my own server hosted somewhere else. :)
I wouldn't put dynamic space on any business that was running their
own mailserver in the first place. That is why I said "home mailserver"
Setting up "home" DSL and Cable connections for businesses is cheating
and I would not take advice from people who advise such. It's my
understanding Comca$t does not do statics for residential customers only
businesses under the comca$t at work product.
Ted
