Setting up Sendmail as a smarthost for Exchange 2003
Posted on 2011-09-07
I'm trying to setup a smarthost/relay server for a couple of clients hosting Exchange 2003 servers on their premises
I'm able to accesses and relay mail from a mail client like outlook or via telnet but as soon as I set up an SMTP connector and smarthost it just refuses to relay from Exchange with an SMTP AUTH error.
The exchange server is on a static IP ADSL link my Sendmail box is in a data centre with a fully qualified domain name and correct DNS and MX records with the registrar.
I'm not an expert on Sendmail or some of the finer Exchange details, hence my question ! I'll also admit to using Webmin on the Linux box for configuration purposes.
We normally use Kerio as out mailserver of choice for the size of client we have, it did exactly the same thing with Exchange generating the same error.
Any help would be greatly appreciated