Re: [exim] smtp timeouts / what to look for

Zbigniew Szalbot wrote:
> Dear all,
>
> I have been getting smtp timeouts from certain domains (mostly Yahoo)
> and I at first I thought I had been blocked as mail to 90% of other
> domains is flowing well (gmail, aol, you name it). It took a lot of
> time to communicate with Yahoo but they have eventually replied
> stating that they are not blocking us.
>
> But even a simple "telnet a.mx.mail.yahoo.com 25" times out. We have
> never had that issue before. If they are not blocking us, what else
> could I check to be the cause of networking problems? If it matters, I
> can telnet yahoo.co.uk and yahoo.co.cn (or yahoo.cn I don't remember
> now) but they seem to be using different MX-s.
>

Can you try to make a tcptraceroute on port 25 for the IPs of the yahoo
MXes, it may give you a hint on where you are blocked.