Automatic reminder - PO acknoledgement

Question

Hi,
I would like to generate an automatic reminder for PO acknowledgement to vendor via email after 10 days to external vendor, and we already have the Purchasing Value Key setup in the system. However, we are struggling on the output type MAHN setup.
Questions:
1 u2013 if we will to send the reminder automatically to vendor via email, I am wondering if I need to schedule a background job for both ME91F and ME9F?
FYI, I read a similar forum that said u201CSchedule background job for ME91F first, and then schedule job for ME9F after the first job done.u201D What exactly does it means and how to do this?
2 u2013 On creating the condition output type, does the following correct for my requirement above (i.e. email and automatically).
Medium: 5 (Ext. send) or 7 (simple mail)?
Dispatch Time: 1/2/3/4??
1     Send with periodically scheduled job
2     Send with job, with additional time specification
3     Send with application own transaction
4     Send immediately (when saving the application)
Thanks.

Answer 1

Dear Vikram and Indra,
I think you both have misread my message.
What I am trying to do is to make a snapshot of MAHN printout to show my user if this standard layout can be use for email layout for the vendor.
System Environment:
Currently, the MAHN output is original SAP status in which there is only Print Output and Fax medium and the program, form routine, and Form are all original standard SAP (i.e. SAPM06P, ENTRY_MAHN, and MEDRUCK).
The PO I used to test has all the three remainder level maintain (i.e. which is using standard SAP purchasing value key of 1, 10day, 20 day, and 30 day)
Problem Faced:
The PO I used to test has a yellow MAHN in the message screen.
Next I went to ME9F to call this PO and this MAHN type, and when hits  Display Message button, the "No print-relevant changes to document 4500150208 exist. Message no. ME140" appears, and when hits
Question 1. Again, all I need is to take a snapshot of this MAHN printout to show my user if the layout is ok as an email layout for the vendor, because the standard SAP of MAHN having only two lines of processing routine (i.e Printout and Fax), and I want to check if the printout form layout is ok to use.
Question 2. Since our requirement is using email for the reminder, do I need to setup a medium for this purpose as standard setting in NACE for this MAHN is only printout and fax and using SAPM06P, ENTRY_MAHN, and MEDRUCK ?