Sending a billing document by e-mail

First, your SAP system must be configure by the basis people in order for you to send an external mail. 

Whether it can send pdf or other file format will depends on the Mail Server you are using.

The basis people must also maintain the conversion parameters so that SAP knows how to convert the billing documents to be send as a pdf file or other desired format specified by your company.

Finally, you have define the IMG in Maintain Output Determination for Billing Documents (Output type MAIL) 

Related Topics:
Create/Modify Billing Document Type
Steps for creating new or changing existing Billing Doc Type

SAP SD Books
SAP Sales and Distribution, Certification, Interview Questions Reference Books

SAP Sales and Distribution Tips
SAP SD - Sales/Distribution Tips

Best regards,
SAP Basis, ABAP Programming and Other IMG Stuff
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