Message F0 388 - Sending by e-mail and printing advice note is not possible

Dear expert,

I would like to send payment advices via e-mail.

OSS note 836169 has been consulted.

The payment supplement (e-mail) has been activated for the company.

The payment supplement has been entered in the vendor master data.

The e-mail address of vendor was entered in the vendor master data.

The mail server and the payment supplement was entered in variant of print program.

What could be the reason for getting message F0 388?

Thank you.

Kind regards,

Linda