## Check that the caller's claimed identity is actually plausible.
## This seems like it's a fairly effective filter on spamminess, but
## it's too blunt a tool. Rather than reject, add a warning header.
## Check that the caller's claimed identity is actually plausible.
## This seems like it's a fairly effective filter on spamminess, but
## it's too blunt a tool. Rather than reject, add a warning header.