BASH function to email via Gmail SMTP

BASH_function_to_email_via_Gmail_SMTP.bash

# Bash function to send email via Gmail SMTP
# sendEmail [subject] [toEmail] [message] (optional attachment path)
function sendEmail(){
    if (($# < 3 ))
    then
        echo ""
        echo "Usage:"
        echo "sendEmail [subject] [toEmail] [message] (optional attachment path)"
        echo ""
        exit 1
    fi
    local subject=$1
    local toEmail=$2
    local message=$3
    local attachmentPath=${4:-''}
    if [[ "" != "$attachmentPath" ]]
    then
        if [ ! -f $attachmentPath ]
        then
            echo "Error no file found at $attachmentPath"
            exit 1
        fi
    fi
    local fromEmail="info+$(hostname | xargs echo)@edmondscommerce.co.uk"
    local fromName=$(hostname)
    local gmailCertsPath=~/gmailCerts/
    if [ ! -d $gmailCertsPath ]
    then
        echo "Setting up Certs"
        local currentDir=$(pwd)
        cd ~/
        mkdir -p $gmailCertsPath
        certutil --empty-password -N -d $gmailCertsPath
        wget https://www.geotrust.com/resources/root_certificates/certificates/GeoTrust_Global_CA.cer
        mv GeoTrust_Global_CA.cer $gmailCertsPath
        echo -n | openssl s_client -connect smtp.gmail.com:465 -CAfile certs/GeoTrust_Global_CA.cer | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > GMAILCERT
        certutil -A -n "Google Internet Authority" -t "C,," -d $gmailCertsPath -i GMAILCERT
        certutil -L -d $gmailCertsPath
        rm GMAILCERT
        cd $currentDir
        echo "done.."
    fi
    if [[ "" != "$attachmentPath" ]]
    then
        echo $message | mailx -v -s "$subject" \
        -a $attachmentPath \
        -S smtp-use-starttls \
        -S ssl-verify=ignore \
        -S smtp-auth=login \
        -S smtp=smtp://smtp.gmail.com:587 \
        -S from="$fromEmail($fromName)" \
        -S [email protected] \
        -S smtp-auth-password=PASSWORDHERE \
        -S ssl-verify=ignore \
        -S nss-config-dir=$gmailCertsPath  \
        $toEmail
    else
        echo $message | mailx -v -s "$subject" \
        -S smtp-use-starttls \
        -S ssl-verify=ignore \
        -S smtp-auth=login \
        -S smtp=smtp://smtp.gmail.com:587 \
        -S from="$fromEmail($fromName)" \
        -S [email protected] \
        -S smtp-auth-password=PASSWORDHERE \
        -S ssl-verify=ignore \
        -S nss-config-dir=$gmailCertsPath  \
        $toEmail
    fi
}