IRISRBL a simple anti-spam Service


Removing IPs from IRISRBL

To exclude an IP from IRISRBL you need to send an email to irisrbl (at) . The exclusion policy is:

  • Only mail managers from the institution with the right credentials can send requests
  • The service is not automatic . You can request help from RedIRIS during normal working hours at irisrbl @ rediris . es
  • IPs excluded using this procedure will be held in quarantine for 30 days outside IRISRBL, after which they can once again be included in IRISRBL.
      It is recommended that the managers who exclude the IP addresses advise relay technicians to ask for the relay to be added to the RedIRIS Whitelist, which will prevent them from being included from IRISRBL
  • Once the IP address has been entered it takes approximately 30 minutes for said IP to be excluded from the IRISRBL zones


Using IRISRBL means there may be delays to some e-mails, as they are blocked. If an e-mail is blocked by IRISRBL the sender should receive an error message inviting them to contact the postmaster of the destination institution so that said block can be lifted immediately. The postmaster of said institution is the person who should use the IRISRBL IP Exclusion Service, with the PER credentials issued by RedIRIS. The IRISRBL DNS zones will be excluded after about 20 minutes, as the zones need to be rebuilt. After that the sender can resend the message.

The IRISRBL exclusion service is an added value as it enables an IP to be unblocked at any time, quickly and easily. The server that blocks the SMTP connection must always send the sender the IRISRBL Service's "official error report" and, above all, include the address of the postmaster of their domain.

550 Service unavailable; IP has been blocked using RedIRIS Reputation Service (IRISRBL). You have to send an email to postmaster@su-ins

The dynamics of the IRISRBL IP Exclusion Service are:

  1. Sender sends mail from a server (IP) to a University (recipient)
  2. Before accepting the SMPT transaction, the university server consults IRISRBL
  3. IRISRBL tells the server that said IP is in the database (OK) and that its reputation is very low
  4. The university decides to block the SMTP transaction from the sender's IP. The message is not delivered and the user receives an error report telling them to contact the university's postmaster
  5. The sender contacts the university's postmaster
  6. The university's postmaster, using the credentials issued by RedIRIS, automatically excludes the IP from IRISRBL using the Exclusion Service
  7. The postmaster contacts the user telling them to resend the mail
  8. The sender resends the message without any problems
Excluding IPs from IRISRBL