user1934: I am building a web-app that needs to send money to different customer's addresses. I would like to minimize transaction costs and avoid unnecesary traffic, therefore I would like to pay all of them at the same time. How many different destinations can one single transaction have?
Cheers!

user153: There isn't a maximum number of outputs but instead a maximum size of data in a block.  So if there was just one transaction with a lot of outputs, the combined size would need to be below the block maximum of 500K.  
I don't know the size of each transaction but you are talking thousands or tens of thousands of outputs before hitting these per-block limits.

1934: <p>I am building a web-app that needs to send money to different customer's addresses. I would like to minimize transaction costs and avoid unnecesary traffic, therefore I would like to pay all of them at the same time. <strong>How many different destinations can one single transaction have?</strong></p>

<p>Cheers!</p>
 153: <p>There isn't a maximum number of outputs but instead a maximum size of data in a block.  So if there was just one transaction with a lot of outputs, the combined size would need to be below the block maximum of 500K.  </p>

<p>I don't know the size of each transaction but you are talking thousands or tens of thousands of outputs before hitting these per-block limits.</p>
