I rarely bounced email due to RBLs from someone I actually correspond with. However I did bounce a message with the sender receiving this message:
Sorry, we were unable to deliver your message to the following address.<m...@example.com> From the maillog: Jul 7 16:35:21 example postfix/smtpd[27776]: NOQUEUE: reject: RCPT from sonic301-25.consmr.mail.gq1.yahoo.com[98.137.64.151]: 554 5.7.1 Service unavailable; Client host [98.137.64.151] blocked using cbl.abuseat.org; from=<otherper...@sbcglobal.net> to=<m...@example.com> proto=ESMTP helo=<sonic301-25.consmr.mail.gq1.yahoo.com> Now you can use mxtoolbox to see that indeed 98.137.64.151 is blocked. Same goes for sonic301-25.consmr.mail.gq1.yahoo.com. However the sender doesn't know the FQDN nor the IP address their email server used. Is there some flag I need to set to provide more information regarding the 554 bounce? Preferably let the person know the RBL that caused it.
