mail() arguements

[fizzwizz]

I am using mail()
eg
mail($To,$Subject,$Msg,$headers);

I want this message ro go to a mailing list of my customers but I want the "to field" on the email to say "My Customers"

For a single email the format would be

$T0="My Customers <[e-mail]>";

but I want "My Customers" to be several emails
How do I do this?