So let's say you have a hosting server that also comes with a mailing server, which I'm sure a lot of people here do. Why would you use Aweber or other mailing services when you can program your own? If you use your mailing server, you have no restrictions on how many subscribers you can send emails to at a time. If you have 10k+ subscribers on your mailing list, you have to pay around $130/month using Aweber. Wouldn't it be much more cost efficient and more customizable for your needs if you program a system or hire a programmer to program a mailing system like that? What are the disadvantages/advantages of using Aweber compared to your own mailing system?