[Info-vax] SMTP AUTH ?

[Phillip Helbig---undress to reply]

In article <j99koa$45m$1 at news.albasani.net>, Jan-Erik Soderholm
<jan-erik.soderholm at telia.com> writes: 

> Actualy, I use DynDNS for handling of my domain (jescab2.dyndns.org).

You could actually continue to use this.  At Dynaccess, you don't 
actually need a "real" domain.  I have my main one there, due to the 
backup MX servers etc, but have others (at DynDNS) on the same IP 
address.

> My ADSL line (well, actualy VDSL since last week, 60 Mb/s downsream and
> 12 Mb/s upsteam using my plain old phone line!) 

What does that cost?  I still have 16 downstream and 1 or 2 upstream 
(can't remember right now.)  Since until recently I had only 10 Mb/s 
LAN, more speed would have helped only upstream, not downstream.  I'm 
sure more is available, but I haven't looked into it yet.  (The next DSL 
node or whatever it's called is only about 50 metres from my house, so 
the connection is good quality and actually a bit faster than 
advertised.)

> modem is setup to
> automaticly update DynDNS whenever the public IP adress of my modem
> changes. No problem with that. I myself always access my systems using
> the domain so I would notice any problems. :-)

Right.  However, suppose that your IP address does not change, but there
is some network problem so that your systems are not reachable, or all
your systems are down or whatever.  Better to have a backup MX server
kick in then deliver the mail when things are working again than to have
the message rejected.  Or suppose there is a problem with updating your
DNS then your IP address changes.  That could mean that mail to you goes
to the new IP.  I think some mail systems are configured by default to
receive mail to any address, even yours. 

> I will check what mail services DynDNS provides. I see no reason at the
> moment to change dynamic DNS provider, but thanks for the tip.

You can use just the SMTP relay server.

> Am I right that Dynaccess is only handling our *outgoing* mails, right ?

Yes.

Alternate gateway:  SMTP-RELAY.DYNACCESS.DE

> I have no problem *receiving* mails to "<some-user>@jescab2.dyndns.org".

Same here.  I have the router send incoming stuff to the cluster IP 
address.  However, if I am not reachable, for whatever reason, the 
backup MX servers at Dynaccess kick in, so nothing is lost.  (One can 
configure ALL incoming mail to go through Dynaccess as well, though I 
don't do this.  If one does, then one can also activate a spam filter 
there, choosing how strict it should operate.)

MAIL> spa tcpip sh host multivax.de

     BIND database

Server:   192.168.1.9      FRITZLEIN

Host address    Host name

217.226.78.100  MULTIVAX.DE

MAIL> spa tcpip sh mx multivax.de


                              BIND MX database


Server:          192.168.1.9      FRITZLEIN

Gate address     Preference       Gate name

217.226.78.100   10               multivax.dynaccess.net
217.114.73.109   15               mail-reject.DE
62.116.176.247   20               backup-mx1.DE
178.63.120.51    21               backup-mx2.DE

multivax.dynaccess.net also points to my IP address; this is similar to 
the domains at DynDNS.