Below are email rejection messages in greater detail. Address blacklisted in Spamhaus The sending site is listed in the Spamhaus blacklist. Address blacklisted in Spamhaus Address blacklisted in local blacklist The sending site is listed in our local blacklist. Address blacklisted in local blacklist ClamAV found bad content The ClamAV anti-virus scanner detected bad content. ClamAV found bad content Sophos found virus The Sophos anti-virus scanner detected bad content. Sophos found virus Relaying denied The message was received from an external system for an address which we do not recognise as local. Relaying denied Bad HELO data There was an error in the protocol used to send mail from one system to another. Bad HELO data Spam score (number) too high Our spam filtering assigns to messages a score which represents the likelihood that they are spam. Spam score (number) too high Access denied This may indicate a mail routing problem or a policy block. Access denied Bad filename in attachment The message contained an attached file with a name we have blocked. Bad filename in attachment Unwanted attachment type Some specific types of attachment are blocked. Unwanted attachment type Bad filename in URL We block messages with links to files with names ending in ".exe". Bad filename in URL Message exceeds maximum fixed size (number) The message exceeded the maximum size of message we will accept. Message exceeds maximum fixed size (number) Content blocked due to source IP characteristics The message appears to be coming from an address that we would not associate with a properly configured mail server and contains an attachment that may contain a virus. Content blocked due to source IP characteristics This article was published on 2024-10-08
