Sendmail, 3rd Edition

Delivery Agent F= Flags

In this section we detail each delivery agent flag. The complete list is shown in Table 20-19. They are presented in alphabetical order, where lowercase letters precede uppercase letters for each delivery agent flag.

When configuring with the mc technique, examine cf/README to determine which delivery agent flags are set by default for which delivery agents.

Table 20-19. Delivery agent F= flags

Flag	§	Meaning
%	F=%	Hold delivery until ETRN or -qI or -qR or -qS (V8.10 and above)
0	F=0 (zero)	Turn off MX lookups for delivery agent (V8.8 and above)
1	F=1 (one)	Don’t send null bytes (V8.10 and above)
2	F=2	Force SMTP even if ESMTP is offered (V8.12 and above)
3	F=3	Extend quoted-printable to EBCDIC (V8.7 and above)
5	F=5	Use the localaddr rule set 5 after local aliasing (V8.7 and above)
6	F=6	Always strip headers to 7 bits (V8.10 and above)
7	F=7	Strip the high bit when delivering (V8.6 and above)
8	F=8	Force EightBitMode=p MIME encoding (V8.7 and above)
9	F=9	Convert 7- to 8-bit if appropriate (V8.8 and above)
:	F=: (colon)	Check for :include: files (V8.7 and above)
|	F=| (vertical bar)	Check for |program addresses (V8.7 and above)
/	F=/ (forward slash)	Check for /file addresses (V8.7 and above)
@	F=@	User can be User Database key (V8.7 and above)
a	F=a	Run extended SMTP protocol (V8.6 and above)
A	F=A	User can be to the LHS of an alias (V8.7 and above)
b	F=b	Add a blank line after message (V8.6 and above) ...