We are running Windows 2000, and Exchange 2000. We have offsite internet e-mail. E-Mail clients are running Outlook 2000, and we are able to send mail interoffice through the usual Exchange 2000 routing, as well as send internet e-mail through our offsite SMTP server. In delivery options in Outlook, Internet e-mail is set to be delivered first. The problem is that occasionally mails sent to external users sometimes slip through to the exchange server rather that through the internet email service and then get stuck in the SMTP queues because it is not an internet email server.
I just found the "forward all unresolved mails to host:" in the SMTP virtual server properties and have put the ISP's DNS name in here but this has not made any difference. Exchange just keeps trying to send the message.
Has anyone got any advice on how I can sort this?