said by kshakir :

If you are using a configuration like the one below, you might want to check if people have actually been receiving your emails. Just ran some tests, and I'm pretty sure smtp.rcn.com is silently eating email again. No return-receipts, error messages, etc. I wonder where these messages are going...

Background:
- RCN blocks all outgoing SMTP (port 25) traffic, *except* to smtp.rcn.com. This means you cannot use smtp.yourcompany.com (port 25) to send email from home.
- You can hack around the port 25 restriction by using a third party server on another port, but this is NOT explained in the RCN help.
- Until a few days ago, you could send email from yourname@yourcomany.com using the RCN smtp server, even without login (great for visiting relatives), as long as you wer connecting from an RCN ip address.

What changed, smtp.rcn.com seems to:

- Still relay email if it comes From:
> any_user@rcn.com
> any_user@gmail.com (evidence of a whitelist??)
> (possible other whitelist domains I don't know)

- Silently NOT relaying message From:
> any_user@yourcompany.com
> any_user@yahoo.com
> any_user@( most domains ).com

Net result: If you work at home, you cannot use smtp.rcn.com, nor your own server, to send email for work, and are forced to sign up for a third party alternate-port server like gmail (here's to hoping you don't have certain customer email, which you might not want relayed through google ).

Anyone know how to report this? I spent hours the last time and got nowhere with the CSRs or sales departments. Posted here and it was fixed pretty quickly, so hoping someone is listening again!

(It'd be nice if RCN unblocked outgoing 25, but I understand that we're currently fighting a war on spam.)