How to remove your IP from InterServer RBL

InterServer's RBL has no removal button. Here is why your IP is listed, and why fixing the cause matters more than asking to be delisted.

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What it is

The list, in plain terms.

The InterServer RBL (rbl.interserver.net) is an IP-based DNS blocklist run by InterServer's mail operation and published under MailBaby's global anti-spam system. It lists IP addresses that InterServer's own network of mail and hosting servers has caught sending spam, hitting spam traps, brute-forcing logins, or tripping web application firewall rules.

It is a deliberately narrow list. An IP has to be seen misbehaving on multiple servers before it is added, and each listing expires automatically after about five days. Because of that, most receivers use it as a scoring signal — for example to add points in SpamAssassin — rather than as an outright block, so a listing here rarely stops all your mail on its own. Stricter receivers that reject on it will still bounce you.

The list flags IP addresses, not domains: it is your sending server that is listed, not the domain in your message. There is no self-service removal form, so the route off the list is to stop the behaviour that got you added and let the listing expire.

Why you get listed

What a listing on InterServer RBL means.

Spam or spam-trap hits Mail from your IP was flagged as junk or reached one of InterServer's spam-trap addresses. This is the classic cause and usually points to a compromised account, an open relay, or bulk sending that recipients mark as spam.

Brute-force and login abuse The IP was caught attacking passwords across InterServer's servers — SSH, FTP, POP, IMAP or mail logins. This often means a machine on that IP is compromised or running a scanner, not that you deliberately sent mail.

Malicious web activity The IP was flagged by mod_security or similar rules as malicious — for example probing or attacking web applications. Listing requires detection on more than one server, so isolated noise is filtered out.

A neighbour in your range A whole /24 can be blocked when several addresses in it are abusive. The range block is lifted as the individual listings inside it expire, so you can be caught by a bad neighbour even if your own IP is clean.

How to get removed

Delisting, in order.

Removal is free. Fix the cause first — a listing you clear without a fix comes straight back.

1 Confirm the listing. Look your IP up in the operator's database at rbldata.interserver.net. Confirm it is actually rbl.interserver.net flagging you before you act, so you are not chasing a listing on a different blocklist.
2 Find and fix the cause. Clean any compromise, secure the abused mail account, close an open relay, stop the host that is brute-forcing logins, or fix whatever tripped the web firewall. Listing is automatic, so if the behaviour continues you will simply be relisted after any expiry.
3 Let the listing expire. There is no manual delisting request and no removal form. Once the abuse stops, the listing drops automatically after about five days. Repeated listings keep the IP on longer, so the priority is making sure the cause does not recur.
4 Contact the operator only if it is a false positive. If your IP is genuinely clean and stays listed, or you believe it was added in error, use the contact and abuse channels on rbldata.interserver.net (abuse is handled via mailbaby.net). Do not expect this to fast-track a normal, deserved listing — the fix is stopping the abuse.
5 Re-check before you resume sending. After the expiry window, look the IP up again at rbldata.interserver.net to confirm it has cleared before you ramp your sending back up.

The official route

Straight to the source.

Removal happens on InterServer RBL's own tool — never through a paid service.

InterServer RBL removal tool ↗

Return codes

127.0.0.2 Listed — the IP is on rbl.interserver.net. The list returns this single positive code on a match (confirmed by the operator's own test address 2.0.0.127.rbl.interserver.net).

How long it takes

Listings expire automatically about five days after the last detection, provided the abuse has stopped. There is no way to speed this up: the list has no manual delisting process. IPs that are listed repeatedly, and /24 ranges caught by several bad addresses, stay listed longer until the underlying listings age out.

Common questions

About InterServer RBL, specifically.

How do I remove my IP from rbl.interserver.net? You do not remove it manually — there is no delisting form. Stop whatever got you listed (spam, a compromise, brute-force traffic, firewall triggers) and the listing expires automatically after about five days. If the abuse continues, you will be relisted.

Does InterServer charge to delist my IP? No. The list is free and removal is automatic, so there is nothing to pay for. Any service offering to remove an InterServer listing for a fee is a scam — no third party can speed up a time-based automatic expiry.

How long does an InterServer RBL listing last? About five days from the last time abuse was detected from your IP. Repeated listings, and range (/24) blocks triggered by several bad neighbours, are held longer until those listings expire.

Why is my IP listed when I never sent spam? The list also flags brute-force login attempts, malicious web activity caught by mod_security, and compromised machines. You can also be caught by a /24 range block when other addresses near yours are abusive, even if your own IP is behaving.

Is a listing on rbl.interserver.net serious? It is narrower than large lists such as Spamhaus and is often used to add spam score rather than to block outright, so it rarely stops all your mail on its own. Stricter receivers do reject on it, so it is still worth clearing.

Where do I check whether my IP is listed? Use the operator's own lookup at rbldata.interserver.net, which lets you search the IP database directly. That is the authoritative place to confirm both the listing and, later, that it has cleared.

The bounce behind the listing.

554 5.7.1 message rejected → The permanent bounce a listing most often triggers — what it means and how to clear it. 550 5.7.1 blocked → A rejection on reputation grounds — usually the same listing, seen from the sender side. Blacklist checker → Re-check your domain and every sending IP once the cause is fixed.

Do not fix it blind.

See every list you are on and every authentication problem behind the listing in one 40-second check — then let monitoring tell you the day a listing comes back.

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