NETWORK TOOLS
Email blacklist check
Check whether a mail server IP address, or your domain’s mail servers, are listed on the main spam blacklists.
Why it matters
If your mail server’s IP address is on a blacklist, other servers may reject or junk your email. It’s one of the most common causes of “my emails aren’t arriving”.
What we check
Your IP address against Spamhaus ZEN, Barracuda, SpamCop, PSBL, Mailspike, UCEPROTECT, NiX Spam and GBUdb. Enter a domain and we’ll check its mail servers.
Listed?
Fix the cause first (often a compromised account or device), then request removal from each list. We can help with both.
MORE TOOLS
Other network tools
What is my IP?
See your public IP address and its hostname.
DNS lookup
See A, MX, TXT, NS and other records for any domain, or reverse DNS for an IP.
WHOIS lookup
Registrar, expiry date and nameservers for a domain, or the owner of an IP range.
Email health check
Check MX, SPF, DKIM and DMARC in one go, with plain-English fixes.
SSL checker
Check who issued a certificate, when it expires and whether it’s trusted.
FREE IT REVIEW
Need help with your network or email?
Tell us a little about your business and we'll come back within one working day to arrange a review, on site or over Teams. No hard sell, just a clear picture of where your IT stands.
Prefer to talk? Call 0161 660 7471 or email hello@posilan.com