qmail not sending email...
 

Hi
First of all, just wanna say hello to all slackers on this forum.

I have a server wich runs a slackware 10.2 with 2.6.19.1. kernel, and i have qmail server installed wich runned fine for about 2 years but now the emails that i send are not received on yahoo-mail at all, on gmail some do make it but after a few hours but in general the mail never comes.
I don't have errors in log, i`m not really up to date on what should i check about qmail since i installed it more that 2 years ago, some suggestions are welcomed.

Thanks
JR