Table 4-12 Flags You Can Set in the Mailer Description for sendmail
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| Flag
| Description
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| C
| If mail is received from a mailer with this flag set, any names in the header that do not have an at sign (@) after being rewritten by ruleset 3 have the @domain clause from the sender tacked on. This flag allows mail with headers of the form:
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|
| From: usera@local
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|
| To: userb, userc@remote
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|
| to be automatically rewritten as:
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| From: usera@local
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| To: userb@local, userc@remote
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| D
| This mailer wants a Date: header line.
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| E
| Escape From lines to be >From (usually specified with U).
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| e
| This mailer is expensive to connect to, so try to avoid connecting normally; any necessary connection occurs during a queue run.
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| F
| This mailer wants a From: header line.
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| f
| This mailer wants the -f from flag, but only if this is a network forward operation. (That is, the mailer gives an error if the executing user does not have special permissions.)
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| h
| Preserve uppercase in host names for this mailer.
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| L
| Limit the line lengths as specified in RFC 821.
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| l
| This mailer is local (that is, final delivery will be performed).
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| M
| This mailer expects a Message-Id: header line.
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| m
| This mailer can send to multiple users on the same host in one transaction. When a $u macro occurs in the argv part of the mailer definition, that field is repeated as necessary for all qualifying users. The L= field of the mailer description can be used to limit the total length of the $u expansion.
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| n
| Do not insert a UNIX-style From line on the front of the message.
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| P
| This mailer expects a Return-Path: line.
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| p
| Always add local host name to the MAIL From: line of SMTP, even if there already is one.
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| r
| Same as f, but sends the -r flag.
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| S
| Do not reset the user ID before calling the mailer. This flag is used in a secure environment in which sendmail ran as root. This flag can be used to avoid forged names.
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| s
| Strip quote characters from the name before calling the mailer.
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| U
| This mailer wants UNIX-style From lines with the UUCP-style remote from <host> on the end.
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| u
| Preserve uppercase in usernames for this mailer.
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| X
| This mailer uses the hidden dot algorithm as specified in RFC 821; basically, any line beginning with a dot will have an extra dot inserted at the front (to be stripped at the other end). This flag ensures that lines in the message containing a dot do not terminate the message prematurely.
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| x
| This mailer expects a Full-Name: header line.
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|