Problem with mail()

I have an if statement which includes two mail() functions. Curiously, the second one works, in that it results in e-mails being received. But the first doesn't - and I cannot for the life of me figure out why. The code is below. It is part of the final sequence for registering for an on-line brainstorming session. $email is a session variable and I know it is working (as it is in the from field of the second e-mail). <code> if ($sequencer == 3){ $email_message="Dear $name $surname: \n\n Your BrainStorm session has been set up. Once payment has been received, you can access your session at http://www.jpb.com/sylvia/brainstorm.php?brainstorm_id=$brainstorm_id. \n\n Alternatively, you can go to http://www.jpb.com/sylvia/, click on the BrainStorm link and enter the BrainStorm session number: $brainstorm_id. \n\n You may invite up to $invites participants to join you. If they have not BrainStormed with Sylvia before, recommend they visit at least ten minutes prior to the session in order to register and read the instructions. \n\n Also be sure you forward the URL and/or BrainStorm session number to participants so that they can join you. \n\n If you have any comments, please feel free to send them to us by replying to this e-mail. \n\n Sylvia Automatic Reply"; mail($email,"Your Sylvia BrainStorm session information",$email_message,"From: info@jpb.com"); if ($invite == "yes"){ foreach($bs_email as $key => $emailgetter){ $mail_message="Dear $bs_name[$key] $bs_surname[$key]: \n $name $surname has invited you to participate in a brainstorming session on: \n $issue (BrainStorm session number: $brainstorm_id) on $bs_date at $bs_time. \n Please confirm via e-mail or telephone your ability to participate. If you have not used Sylvia BrainStorm before, please visit http://www.jpb.com/sylvia/ to familiarise yourself with the system. On the day of the BrainStorm session, please log on to Sylvia, click on \"BrainStorm\" and enter the BrainStorm session number above.\n This is an automatic message generated by Sylvia web based BrainStorming software for $name $surname. \n\n"; mail($emailgetter,"Invitation to participate in web based BrainStorm session",$mail_message,"From: $email"); } } etc... } </code> Many thanks, Jeffrey Baumgartner