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bash script to send email as plain text or HTML, with attachments
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| #!/bin/sh | |
| ############################################################################### | |
| ## mail_it.sh | |
| ## A bash script that sends email as either plain text or HTML. It allows | |
| ## multiple recipients, CC addresses, reply-to addresses, and attachments. | |
| ## | |
| ## Usage: mail_it.sh -s subject -m message -f from_address | |
| ## -t to_address[,...] [-c cc_address[,...]] [-r reply_to_address[,...]] | |
| ## [-a attachment[,...]] [-h] | |
| ## subject: email subject | |
| ## message: email message text | |
| ## from_address: sender address | |
| ## to_address: one or more comma-separated recipient addresses | |
| ## cc_address: one or more comma-separated CC addresses | |
| ## reply_to_address: one or more comma-separated reply-to addresses | |
| ## attachemt: one or more files to be attached to the email | |
| ## -h: send message text as html | |
| ## | |
| ## Examples: | |
| ## mail_it.sh -s "This is a test message" \ | |
| ## -m "Just testing" \ | |
| ## -f "sender@abc.com" \ | |
| ## -t "recip1@abc.com,recip2@abc.com" \ | |
| ## -a "file1.pdf file2.pdf" | |
| ## mail_it.sh -s "This is a test message" \ | |
| ## -h -m "<h1>Heading</h1><pre>Unformatted Text</pre>" \ | |
| ## -f "sender@abc.com" \ | |
| ## -t "recip1@abc.com,recip2@abc.com" \ | |
| ## -a "file1.pdf file2.pdf" | |
| ############################################################################### | |
| ## | |
| ## Process command line arguments. | |
| ## | |
| USAGE="Usage: mail_it.sh -s subject -m message -f from_address | |
| -t to_address[,...] [-c cc_address[,...]] [-r reply_to_address[,...]] | |
| [-a attachment[,...]] [-h]" | |
| HTML=N | |
| while getopts :s:m:f:t:c:r:a:h arguments | |
| do | |
| case $arguments in | |
| s) SUBJECT=$OPTARG;; | |
| m) MESSAGE=$OPTARG;; | |
| f) FROM=$OPTARG;; | |
| t) SEND_TO=$OPTARG;; | |
| c) CC=$OPTARG;; | |
| r) REPLY_TO=$OPTARG;; | |
| a) ATTACHMENTS=$OPTARG;; | |
| h) HTML=Y;; | |
| :) echo "Invalid command line: $USAGE" >&2 | |
| return 1;; | |
| \?) echo "Invalid command line: $USAGE" >&2 | |
| return 1;; | |
| esac | |
| done | |
| ## | |
| ## Verify that required arguments are set. | |
| ## | |
| if [[ "$SUBJECT" = "" || "$MESSAGE" = "" || "$FROM" = "" || \ | |
| "$SEND_TO" = "" ]] | |
| then | |
| echo "$USAGE" >&2 | |
| exit 1 | |
| fi | |
| ## | |
| ## Verify that FROM is a single address. | |
| ## | |
| function VerifyAddress | |
| { | |
| if (( $(echo "$2" | sed "s/[,;:]/ /g" | wc -w) != 1 )) | |
| then | |
| echo "ERROR: '$1' must be a single address" | |
| exit 1 | |
| fi | |
| } | |
| VerifyAddress "-f from_address" "$FROM" | |
| ## | |
| ## Verify that all attachments exist. | |
| ## | |
| if [[ "$ATTACHMENTS" != "" ]] | |
| then | |
| for ATTACHMENT in $ATTACHMENTS | |
| do | |
| if [[ ! -a "$ATTACHMENT" ]] | |
| then | |
| echo "ERROR: $ATTACHMENT does not exist" >&2 | |
| exit 1 | |
| fi | |
| done | |
| fi | |
| ## | |
| ## Create the mime email message. | |
| ## | |
| NL=" | |
| " | |
| BOUNDARY="a1b2c3d4e5f6" | |
| MSG="From: $FROM${NL}To: $SEND_TO" | |
| if [[ "$CC" != "" ]] | |
| then | |
| MSG="${MSG}${NL}Cc: $CC" | |
| fi | |
| if [[ "$REPLY_TO" != "" ]] | |
| then | |
| MSG="${MSG}${NL}Reply-To: $REPLY_TO" | |
| fi | |
| MSG="${MSG}${NL}Subject: $SUBJECT" | |
| MSG="${MSG}${NL}MIME-Version: 1.0" | |
| MSG="${MSG}${NL}Content-Type: multipart/mixed; boundary=$BOUNDARY" | |
| MSG="${MSG}${NL}--$BOUNDARY" | |
| MSG="${MSG}${NL}Content-Disposition: inline" | |
| if [[ "$HTML" == "Y" ]] | |
| then | |
| MSG="${MSG}${NL}Content-Type: text/html; charset=\"us-ascii\"" | |
| MESSAGE="<!DOCTYPE html>${NL}<body>${NL}${MESSAGE}${NL}</body>${NL}</html>" | |
| else | |
| MSG="${MSG}${NL}Content-Type: text/plain; charset=\"us-ascii\"" | |
| fi | |
| MSG="${MSG}${NL}${NL}$MESSAGE" | |
| # Add attachments, if any. | |
| for ATTACHMENT in $ATTACHMENTS | |
| do | |
| FILENAME=$(basename $ATTACHMENT) | |
| MSG="${MSG}${NL}--$BOUNDARY" | |
| MSG="${MSG}${NL}Content-Transfer-Encoding: base64" | |
| MSG="${MSG}${NL}Content-Type: application/octet-stream; name=$FILENAME" | |
| MSG="${MSG}${NL}${NL}`base64 $ATTACHMENT`" | |
| done | |
| MSG="${MSG}${NL}--$BOUNDARY--" | |
| ## | |
| ## Send the email. | |
| ## | |
| echo "${MSG}" | sendmail -t |
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Excellent! Really helped me. You might consider replacing charset="us-ascii" by charset="utf-8" to enable more languages.