mail() To parameter limit

[HeidiR]

I would like to send about 100 emails using the mail() function. Instead of creating a loop and sending 100 separate email messages, I was considering sending one email and populating the mail() To parameter with 100 email addresses. Is these a limit to the number of email addresses I can include in the mail() To parameter?

HeidiR

[bradgrafelman]

Out of curiosity, have you read the following note from the manual page for [man]mail/man?

PHP Manual wrote:

Note: It is worth noting that the mail() function is not suitable for larger volumes of email in a loop. This function opens and closes an SMTP socket for each email, which is not very efficient.
For the sending of large amounts of email, see the » PEAR::Mail, and » PEAR::Mail_Queue packages.