We had a lot of issues delivering mail to yahoo.com.sg about a year ago (just the .sg domain, plain .com was fine). Could establish connection but it'd die halfway through transferring mail. A static route to drop the MTU (for their subnet only) to 1000 fixed the problem right up. Not sure if pmtud was/is broken or what. - Chris On Tue, 2011-04-12 at 15:29 +1000, Nathanael C. Cariaga wrote:
Thanks anyway. I just find this issue intriguing since not all Yahoo mail accounts are affected. In addition, incoming mails from other domain doesn't seem to be affected. That is why I want to check if it is a network issue :)
-nathan
On 4/12/2011 1:17 PM, Matthew Petach wrote:
On Mon, Apr 11, 2011 at 9:54 PM, Brielle Bruns<bruns@2mbit.com> wrote:
On 4/11/11 10:47 PM, Matthew Petach wrote:
mpetach@opstools1:~> telnet 219.90.94.56 25 Trying 219.90.94.56... Connected to static-host-219-90-94-56.tri.ph. Escape character is '^]'. ehlo yahoo.com 554 SMTP synchronization error Connection closed by foreign host. mpetach@opstools1:~>
I imagine when port 25 stops giving 5xx failure message back, mail reception might improve. ^_^;
Works fine for me, your getting an error because your trying to send a command before receiving the first 220, aka RFC violation. As long as you connect, wait a moment without trying to send a command, your fine.
Doh!
See, that's what happens when you ask networking people to try to troubleshoot mail issues. ^_^;;
Sorry about that. :(
Matt