Re: redundant wan links - need 2 relay host

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

Actually I was not authenticating using smtp to neither one of them. What
happens is that to use ISP1 as a relay, I have to be on the ISP1 link (same
with ISP2). That is why I get blocked when the link gets switched.

But you gave me an idea, I just have to configure smtp authentication so in
that way, even if I use the ISP2 link, I will still be able to use ISP1 for
smtp relay because there is authentication. Should od thought of that myself.

Thanks

"Lanwench [MVP - Exchange]" wrote:

Sleb <Sleb@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hi,

My client has 2 internet links in redundancy mode. Both internet
connexions of course are not from the same provider. The problem we
have is that when the primary link goes down, mails are not going out
because exchange is configured with a relay host of the primary ISP.
So we have to manually change the relay to the secondary ISP manually
and it works until the primary link comes back so we change back to
the original relay host (and sending emails directly is not an
option).

Is it possible to configure exchange with 2 smart hosts in case the
first 1 does not work, exchange will try the second smart host so we
don't have to manually change it every time the primary link is down?

Thanks

Do you have to use someone else as a smarthost (meaning, can you not send
out mail directly)?
Or, barring that, can you not authenticate to the ISP's SMTP server and
relay through it regardless of the connection you're on? If the ISP won't
let you do this you could try a third party service like DynDNS MailHop
Outbound. Pretty inexpensive.



.

Relevant Pages

  • Re: Exchange ignores Smart Host settings
    ... could be my virtual SMTP that refuses to relay for some weird reason. ... > BellSouth may require authentication in order to relay through them. ...
    (microsoft.public.exchange.admin)
  • Re: Incoming mail for recipients not in my domain
    ... you can always have them use their own ISP's SMTP server to send ... If you turn off authenticated relay, ... > authentication' and 'Integrated Windows authentication' are enabled. ...
    (microsoft.public.exchange2000.admin)
  • Re: allow authenticated relay?
    ... The problem is on our second SMTP virtual server, setup on a different port, ... the authentication screen and internet side FQDN in the delivery areas. ... The default setting in SMTP server settings, Relay Restrictions is: ...
    (microsoft.public.exchange.admin)
  • Re: Relaying mail to external SMTP
    ... claim by this Tech was authentication is required for SMTP outbound relay. ... We are redirecting to all our email to our local exchange server as soon as ...
    (microsoft.public.windows.server.sbs)
  • sendmail client side smtp authentication problem
    ... sendmail client side smtp authentication problem ... made and installed cf, restarted sendmail, ... # Resolve map (to check if a host exists in check_mail) ...
    (freebsd-questions)