[exim] ACL help needed to accept inbound emails from email g…

Hello,

Please advise an ACL to accept inbound emails from email gateway ( one IP
or a list of mail gateway IPs ) only for some domains, most likely at HELO
stage



Say for example:
#####################
I have a.com,b.com ..... z.com ( a number of domains on the same server )
Email gateway ip list: 1.x.x.x , 3.y.y.y , 8.z.z.z

I want that a.com , c.com and d.com , would accept incoming emails if and
only if emails are coming from 1.x.x.x , 3.y.y.y , 8.z.z.z




Thanks