Thanks for your replies. To demerphq, I must apologise, the code I gave that you refer to does work. The problem was that I was getting "$address" from a multiple combo box on a web page.

This was putting a blank character as the first letter of each recipient, except for the first. I don't know what the character was as it didn't show up at all when I printed $address out on the HTML page generated by the script. It wasn't whitespace either as it survived this:

s/^\s+//;
s/\s+$//;
[download]

However, when I turn $address into an array and do the following to every item but the first:

substr($string, 0, 1) = "";
[download]

It works perfectly. Obviously the HTML puts a weird character between items from the combo box. I was misled by the fact that it doesn't show up when you output the string to HTML. Not as a space, a carrage return or anything.

For the record, I tried substituting the 'smtp' command in the Mail::Mailer code with 'test', to produce the email as output, and ran it on the command line. It produced the following:

to: one@example.com
From: sender@example.com
To: one@example.com
Subject: Subject

I don't know if this was what it should have returned, but it doesn't look at all right to me. Maybe this was why the mail server was knocking it back.

I got MIME::Lite to do exactly what I wanted it to (eventually!). It works, it's good, I'm happy.

Cheers,

Andy.