sendmail, 4th Edition

Delivery Agent Equates

Recall that the form for the M command is:

Msymname, equate, equate, equate, ...

Each equate expression is of the form:

field=arg

The field is one of those in Table 20-18. Only the first character of the field is recognized. For example, all of the following are equivalent:

S=21
Sender=21
SenderRuleSet=21

The field is followed by optional whitespace, the mandatory = character, optional whitespace, and finally the arg. The form of the arg varies depending on the field. The arg might or might not be required.

Special characters can be embedded into the field as shown in Table 21-2 on page 788. For example, the backslash notation can be used to embed commas into the A= delivery agent equate like this:

...    A=eatmail -F0\,12\,99

The complete list of delivery agent equates is shown in Table 20-18. A full description of each begins in the next section. They are presented in alphabetical order, rather than the order in which they would appear in typical delivery agent definitions.

Table 20-18. Delivery agent equates

Equate	Field name	§	Meaning
/=	/path	/=(forward slash) on page 737	Set a chroot directory (V8.10 and later)
A=	Argv	A= on page 738	Delivery agent’s command-line arguments
C=	CharSet	C= on page 741	Default MIME character set (V8.7 and later)
D=	Directory	D= on page 741	Delivery agent working directory (V8.6 and later)
E=	EOL	E= on page 742	End-of-line string
F=	Flags	F= on page 743	Delivery agent flags
L=	LineLimit	L= on page 745