Hi, guys and Gurus :) I know this has been asked about a lot, but I didn't find much help in the old Q's.
Outlook 2000, Win 98 FE, home office (no LAN) 56K dialup direct line, disabled firewall, disabled virus scan. Yeah old computer! ISP has recently converted to smtp authentication server. Now the outlook client won't send. Been through the ISP tech help, changed settings dozens of times. "Server requires auth..." checked. Secure login unchecked. Tried both "use incoming settings" and specified username and pwd. Tried port 25 and 587. I've deleted all mail accounts and replaced them. The error still occurs both in Outlook and Outlook Express. It appears that Outlook is not sending UserID to the smtp server. I made sure that the "Prompt for password" was enabled, but smtp never offered a prompt before kicking me off, although the POP did. Outlook and DUN have been removed and reinstalled. I've installed a new modem just in case. I searched the Microsoft KB and everything suggested I've tried fails the same way. I also took a look at the registry settings for the account and everything seems in order.
Errors were initially 0x800ccc78 and have now changed to 0x800ccc0f. Both produce server errors of 530. Phone line is clean, dos prompt PING to the smtp server works fine with no lost packets. ISP basic connections are fast (for dial-up) and strong.
BTW, I tried my new computer with XP Pro/Outlook 2003 and got the same results over the same line and ISP. Anyone have any ideas about this one?