cUrl Send email using SMTP

send-email.sh

source ./sendEmailCurl-v1.1.sh # OR ./sendEmailCurl-v1.0.sh

EMAILTO='user1@example.com,user2@test1.com' \
EMAILSUBJECT="Test EMAIL $(date +%F)" \
EMAILBODY="This is a test email from $(HOSTNAME)\n USER $(USER)" \
sendEmail "$@"
exit 0

sendEmailCurl-v1.0.sh

#!/usr/bin/env bash

###################################################################
#Script Name	: sendEmailCurl.sh                                                                                             
#Description	: Script for sending email using curl                                                                                
#Args         : NA use variables                                                                                          
#Author       : Shebin Sheikh                                               
#Email        : shebin512@gmail.com
#Ref          : https://blog.edmdesigner.com/send-email-from-linux-command-line/
###################################################################

set -e
[ "${DEBUG}" == 'true' ] && set -x

sendEmail() {

    ##################################################
    # Usage: 
    # source ./sendEmail.sh
    # EMAILTO='user1@example.com,user2@example2.org' \
    # EMAILSUBJECT="Email Subject" \
    # EMAILBODY="Email Body" \
    # sendEmail "$@"
    ##################################################

    [ -z "${EMAILTO}" ] || [ -z "${EMAILSUBJECT}" ] || [ -z "${EMAILBODY}" ] && $(echo -e "Required variable/s missing!\n";exit 1)

    # ===== SMTP CONFIGURATIONS 1 =====
    SMTPADDRESS='smtp://smtp.gmail.com:465'
    SMTPFROM='user@gmail.com'
    SMTPUSER='user'
    SMTPPASS='pass'

    # Reciepients Array
    RCPTS=($(echo $EMAILTO | tr ',' '\n'))
    
    # Generate "--mail-rcpt" for multiple recepients
    CURLRCPTS=''
    for RCPT in ${RCPTS[@]}
    do
        CURLRCPTS="--mail-rcpt ${RCPT} "${CURLRCPTS}
    done

    EMAILCONTENT="From: ${SMTPFROM}\nTo: ${EMAILTO}\nSubject: ${EMAILSUBJECT}\nDate: $(date -R)\n\n${EMAILBODY}"
    
    # exit 0
    curl -v --ssl-reqd ${SMTPADDRESS} \
    --mail-from  ${SMTPFROM}\
    --user "${SMTPUSER}:${SMTPPASS}" \
    $CURLRCPTS \
    -T <(echo -e "${EMAILCONTENT}") 
}



EMAILTO='user1@example.com,user2@test1.com' \
EMAILSUBJECT="Test EMAIL $(date +%F)" \
EMAILBODY="This is a test email from $(HOSTNAME)\n USER $(USER)" \
sendEmail "$@"
exit 0

sendEmailCurl-v1.1.sh

set -e
[ "${DEBUG}" == 'true' ] && set -x


# ===== SMTP CONFIGURATIONS 1 =====
SMTPADDRESS='smtp://smtp.gmail.com:465'
SMTPFROM='user@gmail.com'
SMTPUSER='user'
SMTPPASS='pass'


##################################################
# Usage:
# source ./sendEmail-v1.1.sh
# EMAILTO='user1@example.com,user2@example2.org' \
# EMAILSUBJECT="Email Subject" \
# EMAILBODY="Email Body" \
# sendEmail "$@"
# GLOBAL Vars:
#   SMTPADDRESS
#   SMTPFROM
#   SMTPUSER
#   SMTPPASS
##################################################
sendEmail() {

    [ -z "${EMAILTO}" ] || [ -z "${EMAILSUBJECT}" ] || [ -z "${EMAILBODY}" ] && { echo -e "Required variable/s missing!\n";exit 1; }

    EMAILCONTENT="From: ${SMTPFROM}\nTo: ${EMAILTO}\nSubject: ${EMAILSUBJECT}\nDate: $(date -R)\n\n${EMAILBODY}"
    RCPTS=$(echo "${EMAILTO}" | tr ',' ' ')
    CMD="curl -v --ssl-reqd ${SMTPADDRESS} --mail-from  ${SMTPFROM} --user \"${SMTPUSER}:${SMTPPASS}\""

    # Generate "--mail-rcpt" for multiple recepients
    for RCPT in ${RCPTS};do
        CMD="${CMD} --mail-rcpt ${RCPT}"
    done

    CMD="${CMD} -T <(echo -e \"${EMAILCONTENT}\")"

    eval "${CMD}"
}