There are three useful tables in this chapter.
Table 20-1 lists all the delivery agents by name (Section 20.2.1 [V8.13]).
Table 20-2 lists all the delivery agent equates (Section 20.2.2 [V8.13]).
Table 20-3 lists all the delivery agent
F=flags (Section 20.2.3 [V8.13]).
In Table 20-1, we list the standard and special delivery agents in alphabetical order, along with a convenient description of each.
Table 20-1. Delivery agents described by name
|
MAILER( ) |
Agents declared |
Description |
|---|---|---|
|
|
cyrus and cyrusbb (20.4.1[3ed]) |
Deliver to a local |
|
|
cyrusv2 (20.4.2[3ed]) |
Somewhat like |
|
none |
discard (20.4.3[3ed]) |
Causes the message to be accepted and discarded. |
|
none |
error (20.4.4[3ed]) |
Causes the message to be rejected or quarantined (Section 11.1.2.6 [V8.13]). |
|
|
fax (20.4.5[3ed]) |
Delivers to a program that handles fax delivery. |
|
none |
*file* and *include* (20.4.6)[3ed] |
Performs delivery by appending to a file and handles delivery through
|
|
|
local (20.4.7.1[3ed]), prog (20.4.7.2[3ed]) |
Performs final, local delivery, either to a user’s mailbox or through a program. |
|
|
mail11 (20.4.8[3ed]) |
Allows use of the mail11 program for delivery to DECnet addresses. |
|
|
ph (20.4.9[3ed]) |
Delivery is through the phquery program, which looks up user information in the CCSO nameserver database, and then provides appropriate information for delivery (deprecated). |
|
|
pop (20.4.10[3ed]) |
Delivery for POP users who lack local accounts using MH’s spop. |
|
|
procmail (20.4.11[3ed]) |
Delivers via procmail, which allows additional processing for local or special delivery needs. |
|
|
qpage (20.4.12[3ed]) |
Part of a client/server software package that allows messages to be sent via an alphanumeric pager. |
|
|
smtp (20.4.13[3ed]), esmtp (20.4.13.2[3ed]), smtp8 (20.4.13.3[3ed]), dsmtp (20.4.13.4[3ed]), and relay (20.4.13.5[3ed]) |
The internal SMTP delivery agents. |
|
|
usenet (20.4.14[3ed]) |
The usenet delivery agent is used to post messages to the USENET by means of the inews program. |
|
|
uucp (4.6.1[3ed]), uucp-old (4.6.1[3ed]), uucp-new (4.6.2[3ed]), suucp (4.6.2[3ed]), uucp-dom (4.6.3[3ed]), uucp-uudom (4.6.4[3ed]) |
The delivery agents used to send UUCP mail. |
Recall that the form for the M
cf configuration
command is:
Msymname,equate,equate,equate,...
And that each equate expression is of the
form:
field=argHere, the field is one of those in Table 20-2. 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 21-1 of 21.3.1[3ed]. For
example, 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 20-2. A full description of each begins in the next section. Note that they are presented in alphabetical order, rather than the order in which they would appear in typical delivery agent definitions.
Table 20-2. Delivery agent equates
|
Equate |
Field name |
sendmail text reference |
Meaning |
|---|---|---|---|
|
|
/path |
20.5.1[3ed] |
Set a |
|
|
Argv |
20.5.2 [3ed] |
Delivery agent’s command-line arguments |
|
|
CharSet |
20.5.3[3ed] |
Default MIME character set (V8.7 and above) |
|
|
Directory |
20.5.4[3ed] |
Delivery agent working directory (V8.6 and above) |
|
|
EOL |
20.5.5[3ed] |
End-of-line string |
|
|
Flags |
20.5.6[3ed] |
Delivery agent flags |
|
|
LineLimit |
20.5.7[3ed] |
Maximum line length (V8.1 and above) |
|
|
MaxMsgSize |
20.5.8[3ed] |
Maximum message size |
|
|
maxMsgsPerConn |
20.5.9[3ed] |
Max messages per connection (V8.10 and above) |
|
|
Niceness |
20.5.10[3ed] |
How to nice(2) the agent (V8.7 and above) |
|
|
Path |
20.5.11[3ed] |
Path to the delivery agent |
|
|
QueueGroup |
20.5.12[3ed] |
The name of the queue group to use (V8.12 and above) |
|
|
Recipient |
20.5.13[3ed] |
Recipient rewriting rule set |
|
|
recipients |
20.5.14[3ed] |
Maximum recipients per envelope (V8.12 and above) |
|
|
Sender |
20.5.15[3ed] |
Sender rewriting rule set |
|
|
Type |
20.5.16[3ed] |
Types for DSN diagnostics (V8.7 and above) |
|
|
UID |
20.5.17[3ed] |
Run agent as |
|
|
Wait |
20.5.18[3ed] |
Timeout for a process wait (V8.10 and above) |
In Table 20-3, we detail each delivery agent flag, presented in alphabetical order, where lowercase letters precede uppercase letters for each delivery agent flag.
Note that, when configuring with the mc technique, you should examine cf/README to determine which delivery agent flags are set by default for which delivery agents.
Table 20-3. Delivery agent F= flags
|
Flag |
sendmail text reference |
Meaning |
|---|---|---|
|
|
20.8.1[3ed] |
Hold delivery until ETRN or |
|
|
20.8.2[3ed] |
Turn off MX lookups for delivery agent (V8.8 and above) |
|
|
20.8.3[3ed] |
Don’t send null bytes (V8.10 and above) |
|
|
20.8.4[3ed] |
Force SMTP even if ESMTP is offered (V8.12 and above) |
|
|
20.8.5[3ed] |
Extend quoted-printable to EBCDIC (V8.7 and above) |
|
|
20.8.6[3ed] |
Use the |
|
|
20.8.7[3ed] |
Always strip headers to 7 bits (V8.10 and above) |
|
|
20.8.8[3ed] |
Strip the high bit when delivering (V8.6 and above) |
|
|
20.8.9[3ed] |
Force |
|
|
20.8.10[3ed] |
Convert 7- to 8-bit if appropriate (V8.8 and above) |
|
: |
20.8.11[3ed] |
Check for |
|
|
20.8.12[3ed] |
Check for |program addresses (V8.7 and above) |
|
|
20.8.13[3ed] |
Check for /file addresses (V8.7 and above) |
|
|
20.8.14[3ed] |
User can be User Database key (V8.7 and above) |
|
|
20.8.15[3ed] |
Run extended SMTP protocol (V8.6 and above) |
|
|
20.8.16[3ed] |
User can be to the LHS of an alias (V8.7 and above) |
|
|
20.8.17[3ed] |
Add a blank line after message (V8.6 and above) |
|
|
Section 20.1.1 [V8.13] |
Strips all leading backslashes (V8.13 and above) |
|
|
20.8.18[3ed] |
Exclude comment from |
|
|
20.8.19[3ed] |
Add @domain to recipient |
|
|
20.8.20[3ed] |
Never enclose route addresses in <> (V8.7 and above) |
|
|
20.8.21[3ed] |
Need |
|
|
20.8.22[3ed] |
Mark expensive delivery agents |
|
|
20.8.23[3ed] |
Change extra |
|
|
20.8.24[3ed] |
Delivery agent adds |
|
|
20.8.25[3ed] |
Need |
|
|
20.8.26[3ed] |
Suppress |
|
|
20.8.27[3ed] |
Preserve uppercase in hostname |
|
|
Reserved for Mail11v3 (preview headers) | |
|
|
20.8.28[3ed] |
User Database sender rewrite of envelope (V8.7 and above) |
|
|
20.8.29[3ed] |
Send SMTP VERB to other site (deprecated) |
|
|
20.8.30[3ed] |
User Database rewrite of header recipient addresses (V8.7 and above) |
|
|
20.8.31[3ed] |
Don’t check for loops in EHLO command (V8.7 and above) |
|
|
20.8.32[3ed] |
Agent performs local (final) delivery |
|
|
20.8.33[3ed] |
Specify SMTP line limits (obsolete) |
|
|
20.8.34[3ed] |
Multiple recipients possible |
|
|
20.8.35[3ed] |
Need |
|
|
20.8.36[3ed] |
Don’t use Unix-style |
|
|
Reserved for Mail11v3 (returns multistatus) | |
|
|
20.8.37[3ed] |
Always run delivery agent as recipient (V8.7 and above) |
|
|
20.8.38[3ed] |
Process return path per RFC821 (deprecated) |
|
|
20.8.39[3ed] |
Need |
|
|
20.8.40[3ed] |
250 versus 252 return for SMTP VRFY (V8.8 and above) |
|
|
20.8.41[3ed] |
Delivery agent adds |
|
|
20.8.42[3ed] |
Use a reserved TCP port (V8.6 and above) |
|
|
20.8.43[3ed] |
Strip quotation marks |
|
|
20.8.44[3ed] |
Assume specified user-id and group-id (Revised for V8.7) |
|
|
20.8.45[3ed] |
Preserve uppercase for username |
|
|
20.8.46[3ed] |
Use UUCP-style |
|
|
Reserved for SysVR4 | |
|
|
Reserved for UIUC | |
|
|
20.8.47[3ed] |
Check for valid user identity (V8.7 and above) |
|
|
Section 20.1.3 [V8.13] |
Ignore host status for this delivery agent (V8.13 and above) |
|
|
20.8.48[3ed] |
Need |
|
|
20.8.49[3ed] |
Delivery agent needs RFC2821 hidden dot |
|
|
20.8.50[3ed] |
Deliver with LMTP (V8.9 and above) |
|
|
20.8.51[3ed] |
Apply |
|
|
Reserved for SGI (check for valid home directory) |