| 1 | = How do I delist our servers from sorbs? = |
| 2 | |
| 3 | [http://www.de.sorbs.net/ Sorbs] is a spam black list that is particularly aggressive. It requires all servers sending email to have a mx record and requires the time to live on your mx record to be great than 43200 seconds (12 hours). |
| 4 | |
| 5 | If a server is being blocked by sorbs you might see a message like the following in the mail log: |
| 6 | |
| 7 | {{{ |
| 8 | Service unavailable; Client host [209.51.163.7] blocked using |
| 9 | dul.dnsbl.sorbs.net; Dynamic IP Addresses See: |
| 10 | http://www.sorbs.net/lookup.shtml?209.51.163.7 |
| 11 | }}} |
| 12 | |
| 13 | If you get this message, ensure that the server being blocked has the domain information properly configured: |
| 14 | |
| 15 | {{{ |
| 16 | 0 jamie@liberace:scripts$ dig @a.ns.mayfirst.org -t mx albizu.mayfirst.org | grep -A1 "ANSWER SECTION" |
| 17 | ;; ANSWER SECTION: |
| 18 | albizu.mayfirst.org. 86400 IN MX 0 albizu.mayfirst.org. |
| 19 | 0 jamie@liberace:scripts$ |
| 20 | }}} |
| 21 | |
| 22 | In the example above (for albizu.mayfirst.org), the result shows that an MX record is in place and the time to live is greater than 43200. |
| 23 | |
| 24 | If the server in question does not emit a response like this, fix the DNS record for the server and try again. |
| 25 | |
| 26 | Next, request that the server be de-listed here: https://www.dnsbl.au.sorbs.net/scgi-bin/dulexclusions |