Remote Outlook users can't send e-mail without an SMTP address
I have several users with Outlook clients connected to a Domino server. It works fine for the users who use Outlook inside the office or outside it by dialing our ISP connection to get their SMTP server. But when they connect to another ISP who does not provide an SMTP address, users can't send e-mail through Outlook. Somehow I cannot use our mail server address on the outgoing mail (SMTP), but it works fine to receive mails from our Domino POP3 server.
Any ideas to get the e-mails sent out using Outlook out of the office?
Many ISPs (Earthlink & Juno are two I know of offhand) do not allow you to use other SMTP servers when you are connected to them. They only allow SMTP port 25 traffic to their SMTP servers. Your people would have to have another profile in Outlook setup to send outbound SMTP messages through the ISP's server, using credentials for that server, as well.
This was first published in July 2003