I'm using WBL contrib (smeserver-wbl-0.3.0-10.el6.sme.noarch) to add emails/domains to black/white lists but I'm not sure about his use or limits.
A) Let's start with right field to put an @myclientdomain or myself@anyispIuse.com e-mail/domain:
There are 4 fields:
qpsmtpd whitelisthosts
qpsmtpd whitelisthelo
qpsmtpd whitelistsenders
spamassassin whitelist_from
I used to put it on last one (bold) = spamassassin whitelist_from
So why should I care about others ?
B) And there are a limit for how many I can put in any of these fields ?
How the amount of item in any of them will reflect in time lost or any other problem in mail receiving ?