Mail: smtp proxy without authentication. Activated by auth method "unauth" in smtp_auth directive. Waits for MAIL FROM and first RCPT TO from client, asks auth_http for backend with additional headers Auth-SMTP-Helo, Auth-SMTP-From, Auth-SMTP-To, and establishes connection to backend. Auth-SMTP-From/To currently contain full command (e.g. "mail from: <>"), this may change in future. The functionality was designed to take off load from real smtp servers. Additionally it may be used to implement pop-before-smtp authentication (but dont do it unless you really need it - use real auth instead). Current bug-features: - If only "unauth" method activated in config, other methods (e.g. plain, login) not advertised but accepted. Make sure your auth server handles this gracefully. - If backend server returns error on MAIL FROM / RCPT TO command while proxy tunnel setup, nginx will close connection to client with 4xx error. One may use proxy_pass_error_message directive to pass original error message to client. - Syntax of MAIL FROM / RCPT TO commands from client isn't checked.

# Copyright (C) Igor Sysoev


echo $ngx_n "checking for system endianess ...$ngx_c"
echo >> $NGX_ERR
echo "checking for system endianess" >> $NGX_ERR


cat << END > $NGX_AUTOTEST.c

int main() {
    int i = 0x11223344;
    char *p;

    p = (char *) &i;
    if (*p == 0x44) return 0;
    return 1;
}

END

ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS \
          -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_LD_OPT $ngx_feature_libs"

eval "$ngx_test >> $NGX_AUTOCONF_ERR 2>&1"

if [ -x $NGX_AUTOTEST ]; then
    if $NGX_AUTOTEST >/dev/null 2>&1; then
        echo " little endianess"
        have=NGX_HAVE_LITTLE_ENDIAN . auto/have
    else
        echo " big endianess"
    fi

    rm $NGX_AUTOTEST*

else
    rm $NGX_AUTOTEST*

    echo
    echo "$0: error: can not detect system endianess"
    exit 1
fi