When your server or domain is listed.
WHAT A BLACKLIST IS
A published list of addresses or domains associated with spam.
WHAT HAPPENS WHEN LISTED
Receiving servers consulting that list reject or filter your mail.
WHY IT HAPPENS
Spam sent from your account, usually after a compromise A compromised email account A shared server address affected by another account A spam complaint threshold exceeded
HOW TO CHECK
Blacklist checking services report whether an address or domain is listed.
WHAT TO CHECK
Your domain Your sending address, if you know it
WHAT TO DO IF LISTED
Establish and fix the cause first Then request delisting
THE ORDER MATTERS
Delisting without fixing the cause results in relisting.
FOR SERVER-LEVEL LISTINGS
Ours to address. Open a ticket immediately.
FOR DOMAIN-LEVEL LISTINGS
Usually caused by your own sending.
HOW LONG RECOVERY TAKES
Days to weeks, depending on the list.
WHAT TO DO MEANWHILE
Tell customers your email may be affected and give an alternative.
