Previously in a milter I have used presence of sendmail macro
‘{auth_authen}’ to decide whether a sender is authenticated.
Now, in another milter I am using presence of macro ‘{auth_type}’ to
make that decision.
What is the recommended way of telling whether a sender is authenticated
using sendmail macros? Is one of the auth macros a better choice, or is
it the case that if one is defined all of them are?
Thank you.
