With a list that large, I'd look into using real list software. I'd avoid
yahoogroups for business, but there are apps you can run on your network
(and with your domain) that will send them 1 at a time... you may or may not
hit limits with the ISP though - some have min and/or hourly limits too.

You can use mail merge so only 1 name per message or a utility that slows
sending so you don't hit limits. See
http://www.slipstick.com/addins/massmail.asp for a list of utilities.

--
Diane Poremsky [MVP - Outlook]
Outlook Tips: http://www.outlook-tips.net/
Outlook & Exchange Solutions Center: http://www.slipstick.com

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"Gregg Hill" greggmhill at please do not spam me at yahoo dot com wrote in
message ...
Diane,

How can one send to 500 people if one's ISP limits messages to about 50
recipients per message? I just had someone tell me that he has to break
down his email blast to his clients into groups of 25-30 or they will not
send. He has almost 500 people to whom he sends a monthly update.

No, he is not a spammer. These people are his legitimate clients.

Gregg Hill