Guerrilla Mailer is a fantastic script from David Vallieres. It's a VERY powerful and easy to run PHP mailing script.

As easy as 1, 2, 3 ...

1. Upload to your web host.

2. Import your list.

3. Start mailing!

The contents of the help file:

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Installation:
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Simply Upload the "index.php" to your server and execute the file
in your web browser by simply typing it in to your address bar:

http://www.yourdomain.com/gmailer/index.php

Recommeded: Passowrd protect the direcory you place the
index.php file in so no one can use it if they just happen
to come across it!

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STEP 1: Loading your mailing list
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1. Click the browse button and load your mailing list

2. Check this box if the data fields are enclosed. For example, the following
data is enclosed by quotation marks:

"john","Doe","jd@hotmail.com"

2. If the mailing list contains additional fields, enter the field termination
delimiter. For example:

john,Doe,jd@hotmail.com

In the above line the delimiter is a comma.

Another Example:

john;Doe;jd@hotmail.com;102.333.222.123

This data is separated by a semi-colon

3. Select this option if the mailing list contains titles or not. Basically if the file
contains additional fields other than the email field select the 'With Titles'
option otherwise select the 'Without Titles' option.

4. Enter the data titles if your mailing list contains additional fields. The
title must be entered separated by commas. For example, the titles that could
be used for the following data line could be:

First Name,Last Name,Email
john,Doe,jd@hotmail.com

or another example:

First Name,Last Name,Email,IP Address
john;Doe;jd@hotmail.com;102.333.222.123


NOTE: The titles must be in the same order as the data, or else the script may
not work properly.

5. The total number of email are automatically updated in the Total Emails text box.

NOTE: Do not change this value. If you want to add additional emails, simply add
them to your mailing list file and then Reload the mailing list again.


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STEP 2: Deliver Your Emails
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1. Enter the name that will appear in the from field of each sent email.

2. Enter the email that will appear in the from field of each sent email.

3. Enter the reply-to email.

4. Use the browse button to attach an external file. Note that this file is copied
to your server before it is sent in each email.

NOTE: If you set the Max Emails field you must re-attach your attached file if
you resume.

5. Enter the subject. You can enter the title tags in the subject. For example:
%Name%, Your weekly Newsletter

6. Enter the time delay in seconds between sending emails. Put a zero '0' for no
delay, but this is not recommended since the server may not be able to handle
large amounts of emails at once.

7. If desired, enter the maximum number of emails to send. Say you have 9000 emails
in your list and you only want to send an email to the first 1000, simply enter
1000 in the 'Max Emails' field. To continue, simply enter the next max number of
emails you want to send. Say you want to send another 1000 out of the 9000, simply
enter 2000 and the script will pause at the 2000th email.

NOTE: After the script pauses when the Max Emails is reached, you must specify
a new max number to continue or else the script resets and you will have
to start again.

8. If desired, use the title tags in the subject and message body.

9. If desired, you can select the Plain text or HTML format.

Comes with Master Resell Rights! It is an absolute steal at only $47.00 $7.00!

But, don't take my word for it, click here to watch the Guerrilla Mailer training video!