F110 not sending to multiple recipients

Hi!

We need to send payment advise and direct debit prenotification via F110. If only one email recipient is maintained as contact for the customer or vendor, the email is sent successfully. However, if there are multiple recipients the email is not sent and an error S0666 appears in the spool.

I have used the attached code to send email correspondence to multiple recipients and it works. But it does not seem to behave the same way for F110. Can anyone please advise how the same can be achieved for tcode F110 outputs?

Thanks!