Can't send email over 740 bytes via Webramp 700s

[DarkWarrior2]

I purchased a Webramp 700s (bare unit) from Centrix a while back, and while it seems to work great, there is one big problem:

Any email over 740 bytes in size does not go through, I get error 421 (The service is not available and the connection will be closed) and error number 0x800ccc0f in Outlook.

I thought it was a bad flash of the Sonicwall 5.1.7 firmware, so I reflashed using the Webramp 5.1.1 firmware and the problem remains. I flashed it back to 5.1.7, still no go. My old router (Old PC with Smoothwall 1.0) never had any such problem.

I am using default rules, stealth mode(also tried disabling), PPPoE with Verizon DSL.

I have searched for solutions all over the net, (I think) and it seems I am the only one with this problem. I hope I'm wrong, and that there is a solution.

Any help is appreciated. Thanks!

-Steve

 

[Lord Evermore]

Look up how to manually connect to a mail server and issue commands and see exactly what responses are happening. Or you can enable logging in your mail client and it should show all the commands and errors. I can't imagine why the router would be dropping connections like that, unless it's configured to only allow a port to remain open for a certain length of time? Can you disable all the actual firewall functions so it just acts as a NAT gateway and see if that makes a difference?

 

[DarkWarrior2]

I actually did try disabling all the firewall functions by creating an allow everything rule and disabling the default block all incoming rule after I posted, but no go.

Granted, I may have done the rule changes incorrectly, but I found a way around this problem:


In Outlook, I switched my outgoing server to different one. Luckily for me, Verizon has more than one smtp server. Now outgoing mail works flawlessly.

I hope Verizon doesn't take that server out, the only reason I was using their newer "outgoing.verizon.net" server was that sometime last year they sent emails stating that they upgrading the mail system and want everybody to use the new incoming and outgoing server addresses.

Thanks Lord Evermore, I will research manual mail connection commands to try to get to the bottom of this.

 

[Lord Evermore]

You might want to email Verizon and tell them that you're having problems. They might blame it on your setup, but they might also check and discover that they've misconfigured something.

 

[sean2002]

I have the firewall with the same firmware. I send 1-5 MB emails with no problem