I will add more weight to the 'use a service' comments: don't do it we are very techie and do run a number emailing services for clients (over 100,00 a day in industrial opt in lists) and I can tell you it takes quite a bit of staff time to make sure all the in/out+issues in today's email world are addressed. Making sure our servers are not blocked is a daily effort and making sure the lists are kept clean takes many hours of both programming and, at some point, manual effort. To give you a simple example, we have a database base of well over 1000 email bounce error messages in 14 or so languages just to recognize an email bounce - and that is after pre-coding the message so it's list source can be known -- then add dozens and dozens of inconsistent rules that a spam checker might use to mis-identify a proper email. Just try sending an email message from a industrial newsletter with a product from Xerox ! Even this message will be blocked by some of you's spam blockers Let a service do it for you, they can justify doing all these right, even available software to run yourself rarely does all that is needed -- and that doesn't even include the server monitoring, we have had the HT list blocked by the likes of Comcast and Verizon repeatly. If you do a large volume of emailings (over 50K monthly) , do your home work and find a service that will do the custom work you might need. Rich -- And if anyone wants to talk to us about doing large emailings, email me off line. Jonathon Podolsky wrote: > > > As always, it depends on your particular situations, such as number of > recipients, frequency of emails, and how you want to use it. > > I can see how implementing your own software solution could save money > in the long-run. However, with all due respect to others who > recommend that, I wouldn't consider it unless you're a techie and have > enough time or have have very important custom needs. The 3rd party > email services must have a higher deliverability rate, since they work > out problems with ISP's, follow-up on spam reports, add to white > lists, etc. Plus they work right away, instead of loading your own > software, troubleshooting if problems come up etc. > -- Rich Roth CEO TnR Global Building the really big sites http://www.tnrglobal.com