exchange () {
echo "==============================="
echo "    Exchange checking Tool"
echo "==============================="
echo ""

if [ "$1" == "" ]
    then
        echo "Renseignez le nom de domaine à analyser (exemple : ./general.sh domaine.fr)"
        exit 0
fi

echo "checking NS records for $1:"
echo "-------------------------------------------------"
ns="$(dig ns $1 +short)"
rm="==> PASS"
if [ "$mx" == "" ]
    then
        echo "no NS records found for $1"
        echo "==> ERROR"
        rm="==> ERROR"
else
        echo "$ns"

fi

echo "checking MX records for $1:"
echo "-------------------------------------------------"
mx="$(dig MX $1 +short)"
if [ "$mx" == "" ]
    then
        echo "no MX records found for $1"
        echo "==> ERROR"
        rm="==> ERROR"
    else
        echo "$mx"

        r="$(dig MX $1 +short | grep mx1.mail.ovh.net)"
        if [ "" == "$r" ]
            then mx1=0
            else mx1=1
        fi

        r="$(dig MX $1 +short | grep mx2.mail.ovh.net)"
        if [ "" == "$r" ]
            then mx2=0
            else mx2=1
        fi

        r="$(dig MX $1 +short | grep mx3.mail.ovh.net)"
        if [ "" == "$r" ]
            then mx3=0
            else mx3=1
        fi

        if [ $mx1 -eq 1 -a $mx2 -eq 1 -a $mx3 -eq 1 ]
            then echo "==> PASS"
            else
                echo "==> WARNING"
                rm="==> WARNING"
        fi
fi

echo ""
echo "checking SPF records for $1:"
echo "-------------------------------------------------"
txt="$(dig TXT $1 +short | sed ':a;N;$!ba;s/\n/\n\t /g')"
spf="$(dig SPF $1 +short | sed ':a;N;$!ba;s/\n/\n\t /g')"

if [ "$txt" != "" ]
    then {
        if [ "$spf" != "" ]
            then
                echo "SPF :    $spf"
                echo "TXT :    $txt"
                r="==> WARNING"

            else
                echo "TXT :    $txt"
                r="==> PASS"
        fi }
    else {
        if [ "$spf" != "" ]
            then
                echo "SPF :    $spf"
                r="==> PASS"
            else
                echo "No SPF record could be found"
                r="==> ERROR"
        fi }
fi

echo ""
if [ "$r" == "==> ERROR" ]
    then
        echo "$r"
    else {
        e="$(dig SPF $1 +short | grep 'v=spf1 include:mx.ovh.com')"
        t="$(dig TXT $1 +short | grep 'v=spf1 include:mx.ovh.com')"
        if [ "$e" == "" -a "$t" == "" ]
            then
                echo "SPF does not fit the OVH requirements"
                echo "==> ERROR"
                r="==> ERROR"
            else {
                if [ "$r" == "==> WARNING" ]
                    then echo "There are two entries 'SPF' and 'TXT'"
                fi
                echo "$r"
            }
        fi
    }
fi
rspf="$r"

echo ""
echo "checking Wildcard Domain for $1:"
echo "-------------------------------------------------"
w="$(dig A fjsurhfbvhiughegkelhrgr-wildcard.$1 +short)"

if [ "$w" == "" ]
    then
        echo "==> PASS"
        rw="==> PASS"
    else
        echo "It seems that a wildcard domain is used"
        echo "==> ERROR"
        rw="==> ERROR"

fi

echo ""
echo "checking Autodiscover A-entry for $1:"
echo "-------------------------------------------------"
a="$(dig A autodiscover.$1 +short)"

if [ "$a" != "" ]
    then
        echo "$a"
        echo ""
fi

if [ "$a" == "" ]
    then
        echo "==> PASS"
        ra="==> PASS"
    else
        echo "It seems that an Autodiscover A-entry for domain $1 exists"
        echo "==> WARNING"
        ra="==> WARNING"
fi

echo ""
echo "checking Autodiscover SRV-entry for $1:"
echo "-------------------------------------------------"
srv="$(dig SRV _autodiscover._tcp.$1 +short)"

echo "$srv"
if [ "$srv" != "" ]
    then {
        r="==> PASS"
        srv_p="$(dig SRV _autodiscover._tcp.$1 +short| grep '443 ')"
        if [ "$srv_p" == "" ]
            then
                echo "Port for SRV-entry is not correct"
                r="==> ERROR"
        fi

        srv_z="$(dig SRV _autodiscover._tcp.$1 +short| grep 'ex[2,3]\{0,1\}\.mail\.ovh\.net')"
        if [ "$srv_z" == "" ]
            then
                echo "Target for SRV-entry is not correct"
                r="==> ERROR"
        fi
        echo "$r"
        rsrv="$r"
    }
    else
        echo "No Autodiscover SRV-entry for domain $1 could be found"
        echo "==> WARNING"
        rsrv="==> WARNING"
fi

rall="==> PASS"
if [ "$rm" == "==> WARNING" -o "$rspf" == "==> WARNING" -o "$rw" == "==> WARNING" -o "$ra" == "==> WARNING" -o "$rsrv" == "==> WARNING" ]
    then
        rall="==> WARNING"
fi

if [ "$rm" == "==> ERROR" -o "$rspf" == "==> ERROR" -o "$rw" == "==> ERROR" -o "$ra" == "==> ERROR" -o "$rsrv" == "==> ERROR" ]
    then
        rall="==> ERROR"
fi

echo ""
echo "==============================="
echo "Global result $rall"
}

exchange $1;