[GRLUG] Mailserver configuration

[Michael Mol]

For residential/DHCP customers, maybe. Not business customers.

If you're concerned that things may be being filtered inbound, use one
of your IPs to point to a machine whose firewall is configured to
reject all inbound packets, and then nmap from somewhere else. (Where
that somewhere else does _not_ have any network filtering applied.
I've used my Rosetta Code IP to this end for myself.)


On Thu, Mar 22, 2012 at 9:56 AM, Joseph McLaughlin <jwm8351 at yahoo.com> wrote:
> Use www.grc.com
> to find out what ports are being blocked by your isp use the feature shields
> up
> Charter blocks port 80 and more
>
> There is still a bug in the program must use RAID!
> ________________________________
> From: Adam Tauno Williams <awilliam at whitemice.org>
> To: grlug at grlug.org
> Sent: Thursday, March 22, 2012 9:35 AM
> Subject: Re: [GRLUG] Mailserver configuration
>
> On Wed, 2012-03-21 at 16:12 -0500, L. V. Lammert wrote:
>> Looking at proposing upgrades of mailservers for a couple of clients, and
>> I have beeen trying to decide what would be 'best practice' for one of
>> them that has a Charter link where their IP is in a block that I believe
>> is on more than one blacklist.
>
> If you have a static IP from Charter or Comcast it is probably *not* on
> the black lists;  these networks separate their dynamic and static
> ranges and publish those ranges appropriately.
>
> If you are attempting to host *anything* on a dynamic IP - don't.
>
>> What options have folks used/recommend for handling incoming email? Put
>> the server offsite? Run a frontend store/forward server? If the latter,
>> what about outbound email?
>
> There isn't anything special;  a static IP should be able to receive
> connections on port TCP/25 without any issues.  I do this on static
> Comcast customers,  don't recall if I've done so on Charter.  Otherwise
> if the last-mile network is a concern SMTP is trivial to host on
> something like a Linnode or you can get excellent hosting on Open
> [standard compliant] from companies like FastMail.fm
>
>
> _______________________________________________
> grlug mailing list
> grlug at grlug.org
> http://shinobu.grlug.org/cgi-bin/mailman/listinfo/grlug
>
>
>
> _______________________________________________
> grlug mailing list
> grlug at grlug.org
> http://shinobu.grlug.org/cgi-bin/mailman/listinfo/grlug



-- 
:wq