This document consists of configuration steps and an example which is related with 'define mail to purchasing when price variances occur'. For me , it is an beneficial implementation to control LIV price differences. The root of reason can be quantity variances and price variances. Also , MM experts have to configure setting of tolerances for incoming invoices. It is a related document in incoming invoices --> http://scn.sap.com/docs/DOC-50915
Related oss notes :
301803 - MRM1: Mail to purchasing MLPP variable replacement
554029 - FAQ: SAPoffice - Forwarding/mail system group
552616 - FAQ: SAPoffice - Sending to external recipients
MM Configuration Steps :
Spro->MM->LIV->Incoming invoice->Define mail to purchasing when price variances occur
Activate based on company code :
Procedures / Access sequences
MR0002 procedure for MR1M Logistics invoice verification.
What is the requirement 180 ?
I explain this like belowed :
Kobev is precondition. It is a control based on header level. In LV61B180 show that structure kompbmr has MLPP , result is successful.
Kobed is This is a control on item level and it finally determines whether condition type or access is taken into account. This ABAP form has successful everytime so sy-subrc = 0 
For more detail :
156230 - Requirements: What is permitted, what is not?
Output Types and Mail Concept :
You can fill mail body in this step , you will get an example.
You can use RBKP and RSEG table to create e-mail details. You can see an example in belowed.
Partner : ME (Buyer) , Transmission Medium -> Simple Mail
Condition record :
You have to create condition records based on Company Code, Function Partner.
Communication details :
You have to create a dummy receipent.
External mail tips :
How can i redirect to mail to my e-mail address ?
'Send to Home Addresses of Users' (transaction SO16, register 'Mail sy.grp'). If you use this option SAP Office will redirect the mail to the e-mail address maintained in the user settings. As a precondition to use this kind of automatic transfer you also have to maintain the standard communication method in the user settings (INT E-Mail).
How can i get 'Confirmation of receipt' with e-mail ?
SCOT tcode will be beneficial follow this path --> Settings / Confirmation of Receipt
Finally , buyer and someonelse can get this e-mail.
Best regards.
M.Ozgur Unal