Wierd problem I'm having. Using Outlook 2002, I keep getting error 0x80042109 -- Outlook is unable to connect to your outgoing (SMTP) e-mail server. All the settings are correct... they have been checked and rechecked a dozen times. I can recieve mail fine. Tried telnet [servername] 25 ---> "could not open connection to the host, on port 25" Actually I tried setting up a couple of other accounts (sympatico, yahoo, rogers) just to see if I could get those to work, but all have same problem. (Also tried telnet on those servers) Have Kerio personal firewall and AVG virus scan. Error still occurs upon disabling both. Tried creating new profile, same issue. This computer is part of a small office network (just 2 computers). Linksys wireless B router (Firmare v. 1.50.10). However, I don't believe that the router's firewall is the issue since the other computer can reciece email just fine. Any suggestions/help would be greatly appreciated.

Well, first of all, I'd open Port 25 for incoming traffic and Port 110 for outbound. Also, allow Outlook.exe Internet access in your Firewall software. Are you running Norton Anti-Virus by any chance?

I am not using Norton, but AVG. Ports 25 & 110 are open and outlook.exe permitted. I get the error even upon turning off the firewall and antivirus.

See my similar issue date 10 May. Please, please, please let me know if you manage to solve your problem, as there is a good chance it will solve mine as well. (mchanguion@yahoo.com) Only other bit of diagnosis I can add is that when I delete an e-mail that I tried to send from an account that wont send, I noticed that (when viewing deleted items) the 'FROM' column is not populated?!? What do you read into this?

I'm having the same issue with Verizon SMTP. I tried telnet as well. No luck. One day it worked fine, the next it didn't. I've been through the problem twice with tech support. They think there is an issue on my end. I can't say that their wrong but nothing changed as far as I know. All the settings were checked each time and found to be correct. I'm using the account through a D-Link wireless router using Outlook 2002 and XP. I've tried other email software in futility. Anyway, if anyone has any suggestions on what could be causing this problem please don't hesitate.