What you’re seeing
- Bounces from some outside organizations mention a blocklist, a blacklist, or poor sender reputation.
- The bounce text names a listing service and includes your public IP address.
- Mail reaches some companies fine while others reject it or file it as spam.
- Your mail server's outbound queue shows heavy traffic you can't account for.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- A user account was compromised and used to send large volumes of spam from your server.
- The mail server or a device on the network is acting as an open relay that outsiders can send through.
- A PC on the office network is infected with malware that sends spam directly to the internet.
- The public IP address was previously used by a spammer, or sits in a range flagged as residential or dynamic.
- Missing reverse DNS or mismatched SPF records make your server look like an unauthenticated sender.
Why it matters
Being blocklisted means your messages are refused by any organization that subscribes to that list, which can include major customers, banks and government agencies. Quotes, invoices and replies stop reaching people, and many recipients never see a bounce at all. A listing is also often a symptom of a security incident, such as a compromised account or infected computer, which may have exposed data as well as damaged your reputation.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Can we just ask to be removed from the list?
Most lists allow removal requests, but if whatever caused the spam is still active you will simply be listed again, often with a longer delay. Finding and stopping the source comes first.
Does this mean we were hacked?
Often, though not always. Our engineer looks for compromised accounts, open relays and infected machines and explains in plain English what was found.
How long does delisting take?
It varies by list. Some clear within hours once the problem is fixed, while others take longer, and we tell you what to expect for the lists involved.