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#! /usr/bin/env bash
# User input
sender=typebrook@gmail.com
receiver=typebrook@gmail.com
gapp=$(pass google/imap_for_typebrook)
sub="$(date) test mail from curl"
body="$(echo -e 'just\na\ntest\nmail')"
# check for provided attachment file as a positional parameter
# -z indicating an empty positional parameter
# attachment doesn't exist condition
if [ -z "$1" ]; then
# curl command for accessing the smtp server
curl -s --url 'smtps://smtp.gmail.com:465' --ssl-reqd \
--mail-from $sender \
--mail-rcpt $receiver --user $sender:$gapp \
-T <(echo -e "From: ${sender}
To: ${receiver}
Subject: ${sub}
${body}")
# attachment exists condition
else
file="$1" # set file as the 1st positional parameter
# MIME type for multiple type of input file extensions
MIMEType=$(file --mime-type "$file" | sed 's/.*: //')
curl -s --url 'smtps://smtp.gmail.com:465' --ssl-reqd \
--mail-from $sender \
--mail-rcpt $receiver --user $sender:$gapp \
-H "Subject: $sub" -H "From: $sender" -H "To: $receiver" -F \
'=(;type=multipart/mixed' -F "=$body;type=text/plain" -F \
"file=@$file;type=$MIMEType;encoder=base64" -F '=)'
fi
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