Why am I getting a 554 Spamhaus error when I try and send email?
Spamhaus is a project which collects information about and blocks Spammers in order to keep the Internet a safer place. Your IP Address or Email Address may have been mistakenly identified as Spam which may result in the following error messages:
The message could not be sent because one of the recipients was rejected by the server.
554 5.7.1 RBL Restriction: http://www.spamhaus.org/query/bl?ip=
To resolve this issue we recommend you visit the official Spamhaus blocklist removal center site.