diff --git a/README.md b/README.md
index edacc8b..4cee9cb 100644
--- a/README.md
+++ b/README.md
@@ -94,7 +94,7 @@ There are other environment variables if you want to customize various things in
 | Variable | Default | Value | Description |
 | -------- | ------- | ----- | ---------- |
 | `ADMIN_EMAIL` | unset | email address | Set an administrative contact address for the Block Page |
-| `PIHOLE_DNS_` |  `8.8.8.8;8.8.4.4` | IPs delimited by `;` | Upstream DNS server(s) for Pi-hole to forward queries to, seperated by a semicolon <br/> (supports non-standard ports with `#[port number]`) e.g `127.0.0.1#5053;8.8.8.8;8.8.4.4` Note: The existence of this environment variable assumes this as the _sole_ management of upstream DNS. Upstream DNS added via the web interface will be overwritten on container restart/recreation |
+| `PIHOLE_DNS_` |  `8.8.8.8;8.8.4.4` | IPs delimited by `;` | Upstream DNS server(s) for Pi-hole to forward queries to, seperated by a semicolon <br/> (supports non-standard ports with `#[port number]`) e.g `127.0.0.1#5053;8.8.8.8;8.8.4.4` <br/> (supports [Docker service names and links](https://docs.docker.com/compose/networking/) instead of IPs) e.g `upstream0;upstream1` where `upstream0` and `upstream1` are the service names of or links to docker services <br/> Note: The existence of this environment variable assumes this as the _sole_ management of upstream DNS. Upstream DNS added via the web interface will be overwritten on container restart/recreation |
 | `DNSSEC` | `false` | `<"true"\|"false">` | Enable DNSSEC support |
 | `DNS_BOGUS_PRIV` | `true` |`<"true"\|"false">`| Never forward reverse lookups for private ranges |
 | `DNS_FQDN_REQUIRED` | `true` | `<"true"\|"false">`| Never forward non-FQDNs |
diff --git a/start.sh b/start.sh
index ef8813c..d0b44c1 100755
--- a/start.sh
+++ b/start.sh
@@ -127,13 +127,29 @@ if [ -n "${PIHOLE_DNS_}" ]; then
           change_setting "PIHOLE_DNS_$count" "$i"
           ((count=count+1))
           ((valid_entries=valid_entries+1))
-        else
-          echo "Invalid IP detected in PIHOLE_DNS_: ${i}"
+          continue
         fi
+        if [ -n "$(dig +short ${i//#*/})" ]; then
+          # If the "address" is a domain (for example a docker link) then try to resolve it and add 
+          # the result as a DNS server in setupVars.conf.
+          resolved_ip="$(dig +short ${i//#*/} | head -n 1)"
+          if [ -n "${i//*#/}" ] && [ "${i//*#/}" != "${i//#*/}" ]; then
+            resolved_ip="${resolved_ip}#${i//*#/}"
+          fi
+          echo "Resolved ${i} from PIHOLE_DNS_ as: ${resolved_ip}"
+          if valid_ip "$resolved_ip" || valid_ip6 "$resolved_ip" ; then
+            change_setting "PIHOLE_DNS_$count" "$resolved_ip"
+            ((count=count+1))
+            ((valid_entries=valid_entries+1))
+            continue
+          fi
+        fi
+        # If the above tests fail then this is an invalid DNS server
+        echo "Invalid entry detected in PIHOLE_DNS_: ${i}"
     done
 
     if [ $valid_entries -eq 0 ]; then
-      echo "No Valid IPs dectected in PIHOLE_DNS_. Aborting"
+      echo "No Valid entries dectected in PIHOLE_DNS_. Aborting"
       exit 1
     fi
 else