I have written a program that does a newsletter for our business. I am using MIME::Lite as the module for doing the sending. Here is the subroutine that I am passing data to from a Database. 
sub sendEmail {
    my($email, $c_first) = @_;

    $msg = MIME::Lite->new(
        To      =>$email,
        From    =>'marketing@taieriprint.co.nz',
        Subject =>$subject,
        Type    =>'multipart/related'
    );

    $msg->attach(Type => 'text/html',
        Data => qq{<html>
        <HEAD>
        <TITLE>Taieri Print Ltd</TITLE>
        </HEAD>
        <body bgcolor="#DBDBDB">
        <table align="center" width="645" border="0"     bgcolor="whit
+e">
        <tr><td align="center"><img src="cid:tplogo.gif"></td> 
        </tr><tr height="3" CELLPADDING=20><td align="right"><font siz
+e="2" face="Microsoft Sans Serif">$Month $Year</font></td></tr></tabl
+e>
        <table CELLPADDING=20 align="center" width="645" bgcolor="whit
+e">
        <tr><td align="left"><font face="Microsoft Sans Serif" size="2
+">Dear $c_first,</font><br>
        <font face="Microsoft Sans Serif" size="2">$message</td></tr><
+/font>
        <tr><td align="center"><font size="1" face="Microsoft Sans Ser
+if"><br>We hope you have enjoyed recieving this message. 
        However, if you'd rather not recieve future newsletters from u
+s, then please 
        <a href="mailto:mailbird&#64;taieriprint.co.nz?subject=Unsubsc
+ribe">
        click here</a> to unsubscribe.
        </td></tr></table>
        </body>
        </html>
        }        
    );

    $msg->attach(Type => 'image/gif',
        Id   => 'tplogo.gif',
        Path => 'C:/mailbird/tplogo_new.gif',
    );


    if ($query->param('attach')) {
        $msg->attach(Type        => 'application/pdf',
             Path        => $attachment,
             Filename    => $filename);
    }

    $msg->send('smtp', 'smtp.taieriprint.co.nz') or warn    print "Una
+ble to send email: $_";
    return;
}

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I am wanting to write to a file any emails that are unable to be sent, rather than the application 'dying'. This will ensure that a bogus email address doesn't stop the rest of the emails being sent. For the $msg->sent part of the subroutine I have tried using or warn and printing to a file with no success. Can someone please give me a idea on how to achieve this goal. Thankyou very much.

In reply to Email error checking by Anonymous Monk

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