Can Greylisting be used in an active-active High availability FortiMail enviroment

Can Greylisting be used in an active/active High availability enviroment (with 2 mx records pointing to 2 fortimails)?

 

I mean:

When an email comes and gets greylisted by fortimail#1, if the second attempt  comes to the other fortimail (fortimail#2)

what happens? It will be graylisted again?

 

So we have this scenarios:

 

Hope 1)        mail comes,                        gets greylisted                  FM1       mx1       –

Hope 2)        mail comes again,            is cleared                             FM1       mx1       –

Hope 3)        mail passes

 

 

Hope 1)        mail comes,                        gets greylisted                  FM1       mx1       –

Hope 2)        mail comes again,            gets greylisted                  FM2       mx2       –

Hope 3)        mail comes again,            is cleared                             FM1       mx1       –              or FM2                  mx2

 

What will haped in scenario 2 ?  

Will email be delivered always?

 

 

What will happen if we have 3 or 4 or more fortimails?

 

Hope 1)        mail comes,                        gets greylisted                  FM1       mx1       –

Hope 2)        mail comes again,            gets greylisted                  FM2       mx2       –

Hope 3)        mail comes again,            gets greylisted                  FM3       mx3       –

Hope 4)        mail comes again,            gets greylisted                  FM4       mx4       –

 

Sender gives up????