EQ Forum Admin
These errors indicate that there are DNS resolution problems somewhere between your domain and AOL. This usually means that AOL is unable to resolve your domain name in DNS before accepting that mail for delivery.
|550 "username" Is Not Accepting Mail From This Sender||AOL||0|
|C||Wrong Alternate Email causing Error of 550 !||Yahoo Mail||0|
|Outlook.com email addresses rejecting email with 550 SC-001 (BAY0-MC1-F26)||Mail Server Support||0|
|cPanel/WHM: Fix for 550 Access denied - Invalid HELO name||Mail Server Support||0|
|SMTP 550 Blocked - Why is my email blocked with an error message?||Mail Server Support||0|