On 4/19/06, Mark Foster <blakjak(a)blakjak.net> wrote:
Just a quick
email to the list to find out what other service
providers are doing regarding XTRA blocking port 25 when your company
does not provide internet connections, so many of your customers are
using xtra as a service provider but not for other services wuch as
Many of my customers are XTRA customers, but are also vodafone etc
etc, so an external autheticated mail server is a huge bonus for them.
Use secure port?
Xtra offer a product called 'Secure Remote Email' which is an alternative
for roaming customers. SSL, and works regardless of the ISP you're on.
Is good to know for customer reference. Telstra Clear offers this
already and i didnt know that Xtra do. Cool.
Note that if your Usually-via-Xtra customer was on
Vodafone and sending to
a destination other than xtra, using smtp.xtra.co.nz would never have
worked in the first place as Xtra don't provide Authenticated SMTP except
for their SRE product, IIRC.
Yea - our customers all use our servers which require authenticated
access, so my issue was more with what todo with XTRA customers...
Likewise your Usually-via-someone-else customer
attempting to send their
mail back to someone-elses-smtp-server over a service with Port 25 Blocked
will have similar relay issues unless theyre authenticating somehow -
however, 'thems the breaks' if theyre on Xtra's network, and their network
provider (whoever it is that is Xtra's customer on their behalf) hasn't
gotten an exception to the rule. Solution, as already suggested: Use
another port, or use smtp.xtra.co.nz.
Yep - was going to use port 2525, but have decided to use 587 which is
an industry standard port for mail.
Xtra have stated that people who want to be excluded from the
block need only ask.
Yep :) - have you seen what they want you to agree to for this?
Tell them your AV software
Tell them your firewall software
State the reason for doing it
Tell them your mail server software
Agree to terms and conditions including that you will keep your AV and
firewall software up to date at all times.
I say good on Xtra for finally implementing something
which should have
been done years ago! The doomsayers need to start thinking pragmatically
about this; there are plenty of ways around this. (Heck, when i'm
travelling, I am either using SSH or Webmail..)
Agreed, i think.
I had a thought that it would be quite a good idea for service
providers to be able to apply to XTRA to get there servers excluded
from the list. Haven't thought about the practically or legal issues
here - of which there are many!
Side: I remember doing some work with Vodafone and Telecom a number of
years ago regarding SMS gateways and having to sign some documents
that basically said: "If you stuff our network, or dont, for any
reason, or not, to do with anything, or nothing: You will pay" - was a
laugh at the time!