With no arguments, the program will ask the user for the To, Subject, and CC fields. It will then ask for the name of a MIME content-type. Next, it will ask the user for the name of an existing file containing that type of data. After this, it will ask what encoding type, if any, should be applied to this data. Finally, it will ask if the user wants to include information from an additional file, in which case the last three questions will be repeated for the next file.
Alternately, all of this information can be provided on the command line, using the following options:
-b -- specifies Batch (non-interactive) Mode. Will exit with an error message if all additional needed information is not provided on the command line.
-c cc -- specifies the CC address
-D description -- specifies a string to be used as the Content-description value
-e encoding -- specifies the encoding type. Must be either "base64", "quoted-printable", "7bit", or "x-uue". "7bit" means no encoding is performed.
-E -- specifies that the file being included is already a full MIME entity, and does not need to have any Content-* or other header fields added.
-f filename -- specifies the file containing the data
-F from -- specifies the From address
-i "<content-id> -- specifies the content-id value for the MIME entity. Must be a legal content-id value, enclosed in angle brackets.
-I "<content-id>" -- specifies the content-id for the multipart entity being created by metasend, if any. Must be a legal content-id value, enclosed in angle brackets.
-m MIME-type -- specifies the MIME content-type
-n -- specifies that an additional file is to be included. Before each use of the -n option on the command line, the options -m, -c, and -f, at a minimum, must have appeared,and must appear separately for each included file.
-o outputfile -- specifies that the output from metasend should go to a named file rather than be delivered as mail.
-P preamblefile -- specifies a file containing alternative text to be put in the "preamble" area of a MIME multipart message.
-s subject -- specifies the Subject field
-S splitsize -- specifies the maximum size before splitting into parts via splitmail(1).
-t to -- specifies the To address
-z -- specifies that the temporary files should be deleted EVEN IF DELIVERY FAILS.
-/ subtype -- specifies the use of a MIME multipart subtype other than "mixed".
This is intended largely for mail hackers. A much friendlier interface to non-text mail is provided by mailto(1).
If more than one file is given, the parts will be combined into a single multipart MIME object.
The mail will be delivered using the splitmail(1) program, so if it is very long it will arrive as several pieces which can be automatically reassembled by metamail. The definition of "very long" can be altered using the -S flag or the SPLITSIZE environment variable, as described in the splitmail(1) man page.
Should do MIME syntax checking on user-supplied content-type fields. Users are all too likely to provide bogus MIME content-type values, alas. In particular, there are various characters that are not allowed in parameters unless the parameters are enclosed in double quotes, but this sort of restriction is hard to enforce in a shell script!
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