Hi,
You can just click F4 help to list all the smartforms in your system via trx smartforms.
For the Z-smartform, it should also be listed and you can display it to see if the email content is what you have received in sost.
Some standard smartforms such as BBP_PO can also be referenced.
I also found the following info which should be of help:
===
class /SAPSRM/CL_PDO_BO_PO
method /SAPSRM/IF_PDO_DO_OUTPUT~SEND_OUTPUT
FM BBP_OUTPUT_PARAMS_SET
class /SAPSRM/CL_PDO_BO_PO
method /SAPSRM/IF_PDO_BO_PO~PREVIEW_PO
This is similar to form preview_po(LBBP_PO_APPF35)
For print perview, this FM BBP_OUTPUT_PO_PREVIEW_SMART will be of help
for PO.
For print output, this FM BBP_OUTPUT_PO_GETDETAIL_SMART will be called
for PO.
===
Best regards,
Ivy