Append alias domain

src/freedombone-base-email

@@ -1043,6 +1043,8 @@ function email_smtp_proxy_through_isp {
             return
         fi
 
+        isp_smtp_domain_alias=
+        isp_smtp_domain_alias_line=
         temp_proxy_file=/tmp/emailproxy.txt
         host "$isp_smtp_domain" > $temp_proxy_file
         if [ -f $temp_proxy_file ]; then
@@ -1063,7 +1065,9 @@ function email_smtp_proxy_through_isp {
                             line_str="$line_str2"
                         fi
                         if [[ "$line_str" == *'.'* ]]; then
-                            isp_smtp_domain="$line_str"
+                            # line to be added to the exim password file
+                            isp_smtp_domain_alias="${line_str}"
+                            isp_smtp_domain_alias_line="${isp_smtp_domain_alias}:${isp_smtp_username}:${isp_smtp_password}"
                         fi
                     fi
                 fi
@@ -1076,13 +1080,18 @@ function email_smtp_proxy_through_isp {
           echo '#';
           echo '# see exim4_passwd_client(5) for more documentation';
           echo '#';
-          echo "${isp_smtp_domain}:${isp_smtp_username}:${isp_smtp_password}"; } > /etc/exim4/passwd.client
+          echo "${isp_smtp_domain}:${isp_smtp_username}:${isp_smtp_password}";
+          echo "${isp_smtp_domain_alias_line}"; } > /etc/exim4/passwd.client
         if ! grep -q 'dc_eximconfig_configtype=' /etc/exim4/update-exim4.conf.conf; then
             echo "dc_eximconfig_configtype='satellite'" >> /etc/exim4/update-exim4.conf.conf
         else
             sed -i "s|dc_eximconfig_configtype=.*|dc_eximconfig_configtype='satellite'|g" /etc/exim4/update-exim4.conf.conf
         fi
-        sed -i "s|dc_smarthost=.*|dc_smarthost='${isp_smtp_domain}::${isp_smtp_port}'|g" /etc/exim4/update-exim4.conf.conf
+        if [ "${isp_smtp_domain_alias}" ]; then
+            sed -i "s|dc_smarthost=.*|dc_smarthost='${isp_smtp_domain_alias}::${isp_smtp_port}'|g" /etc/exim4/update-exim4.conf.conf
+        else
+            sed -i "s|dc_smarthost=.*|dc_smarthost='${isp_smtp_domain}::${isp_smtp_port}'|g" /etc/exim4/update-exim4.conf.conf
+        fi
         if [[ "$(hostname)" != *'.local' ]]; then
             sed -i "s|dc_readhost=.*|dc_readhost='$(hostname)'|g" /etc/exim4/update-exim4.conf.conf
         fi