1REFORMAIL(1) Double Precision, Inc. REFORMAIL(1)
2
6 reformail - E-mail reformatting tool
7
9 reformail -s command [option...]
10 reformail -D len filename
12 reformail -x header:...
14 reformail -X header:...
16 reformail [options...]
18 See below for additional options
20
22 The reformail program reads a message on standard input, reformats it
23 in some way, and writes the message to standard output:
24 Splitting mailboxes into individual messages
26 The -s option splits the mbox-formatted mailbox file on standard input
27 into individual messages. An external program is executed for each
28 message. The contents of each individual message will be provided to
29 the external program on standard input.
30 If the FILENO environment variable is set to a number, reformail will
32 consecutively increment FILENO each time the program is executed for
33 each individual message.
34 If FILENO is not set, it's initial value will be "000". If FILENO is
36 set to a non-numeric value, FILENO will remain unchanged.
37 Detecting duplicate messages
39 The -D option implements a simple way to delete duplicate messages in
40 incoming mail. filename is a file that will be approximately 'len'
41 bytes long. This file will be used by reformail to save message IDs
42 seen in recent mail. reformail reads the message on standard input. If
43 the message has a Message-ID: header that's already in the cache file,
44 reformail terminates with the exit code set to 0. Otherwise, reformail
45 terminates with the exit code set to 1.
46 Note
48 Unlike a similar feature in the formail command, reformail takes
49 care of locking the file, so it's not necessary to implement your
50 own locking mechanism for this option.
51 Extracting headers
53 The -x and -X options extract the indicated headers from the message,
54 and print them to standard output. Multiple -x and -X options can be
55 specified at the same time, and may be intermixed.
56 The -x option extracts and prints the contents of the header. The -X
58 option prints the name of the header as well.
59 In all other situations, reformail copies the message on its standard
61 input to its standard output, reformatting the message as follows:
62
64 -a'header: value'
65 Append a custom header to the message if this header does not
66 already exist. If the header is either Message-ID: or
67 Resent-Message-ID: and the value is empty, reformail generates a
68 (hopefully) unique message ID for you.
69 -A'header: value'
71 Append a custom header to the message even if this header already
72 exists. If the header is either Message-ID: or Resent-Message-ID:
73 and the value is empty, reformail generates a (hopefully) unique
74 message ID for you.
75 -c
77 Concatenate multi-line headers. Headers split on multiple lines are
78 combined into a single line.
79 -dn
81 If n is 1, each line will be terminated with CRLF. If n is 0
82 (default), each line will be terminated with LF. reformail reads a
83 message with either line terminator, and will force the message to
84 have the specified line termination.
85 -f0
87 Any initial blank lines are removed. If the first non-blank line is
88 a "From_" line, it gets converted to a "Return-Path:" header, and
89 any existing "Return-Path:" header gets removed. If the message
90 does not start with a "From_" line, the message remains unchanged.
91 -f1
93 Add the "From_" line to the message, if it's not there. reformail
94 will attempt to generate the "From_" line from any Errors-To:,
95 Return-Path:, or From: headers in the message. "root" will be used
96 if reformail is unable to determine the return address.
97 -i'header: value'
99 Appends a custom header to the message. If this header already
100 exists it is renamed by prepending "Old-" to the name of the
101 header.
102 -I'header: value'
104 Append a custom header to the message. If this header already
105 exists in the message, the old header is completely removed. If the
106 value is empty, any existing header is completely removed, and
107 nothing gets appended.
108 -R oldheader: newheader:
110 Rename the indicated header.
111 -u'header:'
113 If this header occurs multiple times in the message, remove all
114 occurrences except the first one.
115 -U'header:'
117 If this header occurs multiple times in the message, remove all
118 occurrences except the last one.
119
121 The autoreply options from earlier versions of mailbot have been moved
122 into mailbot(1)[1].
123
125 For the -a, -A, and -I options, a space after the header name and the
126 colon is considered to be a non-empty field.
127 Do not provide the same header to more than one family of
129 header-modifying options, such as -u/-U and -a/-A. Doing so yields
130 unpredictable results. It's better to run reformail several times (use
131 a pipe, perhaps).
132
134 courier(8)[2], sendmail(8), mailbot(1)[1], maildrop(1)[3].
135
137 Sam Varshavchik
138 Author
139
141 1. mailbot(1)
142 http://www.courier-mta.org/maildrop/mailbot.html
143 2. courier(8)
145 http://www.courier-mta.org/maildrop/courier.html
146 3. maildrop(1)
148 http://www.courier-mta.org/maildrop/maildrop.html
149Courier Mail Server 11/04/2020 REFORMAIL(1)