Below is a listing of our most commonly blocked E-Mail reasons at Spacequad Internet Services.
521 The IP %IP% is Blacklisted by MAPSResponse.
521 The IP %IP% is Locally Blacklisted.
521 The domain %Domain% is Blacklisted.
521 The EMail %EMailFrom% is Blacklisted.
521 The EMail %EMailTo% is Blacklisted.
557 Your IP %IP% does not have a reverse DNS entry. Disconnecting...
557 Your domain %Domain% does not have a valid MX DNS record. Disconnecting...
557 You exceeded then maximum number of RCPT TO. Disconnecting...
557 Your IP address is from a blacklisted country. Disconnecting..
557 You are not allowed to send mail to %EMailTo%
557 This email is rejected. It contains keywords rejected by the antispam content filter.
557 This email is rejected because it contains a virus
550 The sender did not meet (SPF) Sender Policy Framework rules. Please see http://spf.pobox.com
552 This email is rejected. It exceeds the maximum allowed message size.
521 A URL in the email is Blacklisted by SURBL: %MAPSResponse%.
421 Your IP is temporarily blocked, please try again later.
557 This email is rejected. It contains content rejected by the antispam filter.
557 Your IP %IP% is currently listed in SpamFilter ISP's Distributed Blacklist. Please see http://www.logsat.com/SFDB/why.asp for details.
521 Emails with an empty MAIL FROM are not allowed
Most common reason is EmailTO is not in AuthorizedTOEmail list...
So what this means is that your E-Mail was rejected for one reason or another! SPAM is NOT allowed here, and our users thank us every day!
Last Updated Saturday, February 03 2007 @ 04:39 AM Eastern Standard Time|7,142 Hits 