Can't send mail since 10.4.6 update

Since updating my OS to 10.4.6 I can't send mail. I can receive mail and I can browse online. But mail will not go out. I've verified all the Outgoing Mail Server info SEVERAL times and have had no luck. I've enabled Entourage to handle mail instead of MacMail and it won't work either. Totally stumped.
Same thing has happened on my iBook G4 laptop by the way. I'm convinced that the update has something to do with this.

INTERNET CONNECTION LOST
so... since the 10.4.6 update once my computers fall asleep the connection to my wireless router is lost. (mail seems to be working ok, when i have an internet connection...)
I have tried multiple things to fix this. Thus far the only solution seems to be resetting the router to use connect back to the internet. Once this is done the internet connection works fine, until lost or the computers go to sleep. When i wake the computer i have to do it all over again... and on top of it the post link is missing on all the pages!!! so i am replying here.
So this time I have rebooted to my external drive with the previous version (10.4.5) to see if indeed it is the 10.4.6 update that seems to have hosed this connection somehow.
HELP please, this is terrible annoying. Is anyone else experiencing this?
thank you.
PowerBook G4 and PowerPC dual G5 (10.4.6 both) Mac OS X (10.4.6)

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