Question about sendmail.mc

[Thomas Cameron]

Hi all -

I am using clamav-milter, spamass-milter, and milter-greylist 1.6.

I am not an m4 expert by any stretch of the imagination.  My sendmail.mc
file looks like this:

dnl INPUT_MAIL_FILTER(`greylist',`S=local:/var/milter-greylist/milter-
greylist.sock')dnl
define(`confMILTER_MACROS_HELO', `{verify}, {cert_subject}')dnl
define(`confMILTER_MACROS_ENVFROM', `i, {auth_authen}')dnl

INPUT_MAIL_FILTER(`spamassassin', `S=local:/var/run/spamass.sock, F=,
T=C:15m;S:4m;R:4m;E:10m')dnl
define(`confMILTER_MACROS_CONNECT',`b, j, _, {daemon_name}, {if_name},
{if_addr}')dnl

INPUT_MAIL_FILTER(`clamav-milter', `S=local:/var/run/clamav/clamav-
milter.sock, F=T,T=S:4m;R:4m;E:10m')

I have simply done what the INSTALL or README docs for each of the
milters tells me to do.

Now I notice that milter-greylist 2 tells me to add this to my
sendmail.mc file:

INPUT_MAIL_FILTER(`greylist',
`S=local:/var/milter-greylist/milter-greylist.sock')
define(`confMILTER_MACROS_CONNECT', `j, {if_addr}')
define(`confMILTER_MACROS_HELO', `{verify}, {cert_subject}')
define(`confMILTER_MACROS_ENVFROM', `i, {auth_authen}')
define(`confMILTER_MACROS_ENVRCPT', `{greylist}')

This will put different settings for confMILTER_MACROS_CONNECT and
confMILTER_MACROS_HELO into my sendmailmc file.  I can't imagine that is
a good thing.

Can someone who understands milters better than me give me a layman's
explanation of what all these conf* entries in sendmail.mc are so I can
make a decision about what to do when I run into conflicting
instructions like this?

Or, if you know of a good FM to R that can explain this in a way that a
non-programmer, non-sendmail guru can understand, that would be great as
well.

Thanks!
Thomas