Section 25.4.1
The ability to include headers based on sendmail macros was added (V8.10 and later).
Section 25.5
Headers can now be screened by using rule sets (V8.9 and later).
Section 25.6.3
The H_BINDLATE header flag was added (V8.10 and later).
Section 25.6.16
The H_STRIPCOMM header flag was added (V8.10 and later).
Section 25.6.18
The H_USER header flag was added (V8.11 and later).
Auto-Submitted:
The auto-generated phrase used by vacation was changed to auto-replied for the Auto-Submitted : header (V8.12 and later).
Received:
V8.9, V8.10, V8.11, and V8.12 each added additional information to the Received : header.
