Just a quick email to the list to find out what other
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.
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.
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.
Noted that Xtra have stated that people who want to be excluded from the
block need only ask.
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..)