[exim] help with if-then conditional logic

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Lähettäjä: v-ex
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Vastaanottaja: exim-users
Aihe: [exim] help with if-then conditional logic
hi.
I'm having a hard time understanding the if-then conditional logic in exim and was hoping someone could help.

I'm trying to add a condition to an ACL that would say:

if $varA is-not-blank and $varB is-not-blank and $varA not equal $varB

thanks