Ok here is my problem, I have been reading these forums for quite a while n ow. And since this has been happening, since the beginning of Feb, I have been actively searching though these forums to find something to help me resolve this issue. here is the issue, I use a mail relay service for sending my email out. Works perfectly and I am very happy. I setup my server following the debian etch 4, with ISPConfig. So recently I have been being bombarded with requests to send emails. I have been noticing some are getting through. Below you see my mail.log of the issue. I have been noticing the sasl_username=test seems to be what there useing, but I have never setup a test account, is this standard or did I miss something on this. Code: Feb 12 18:59:58 svr2 postfix/smtpd: warning: 220.127.116.11: hostname 87-127-167-31.no-dns-yet.enta.net verification failed: Name or service not known Feb 12 18:59:58 svr2 postfix/smtpd: connect from unknown[18.104.22.168] Feb 12 18:59:59 svr2 postfix/smtpd: F24009381D5: client=unknown[22.214.171.124], sasl_method=LOGIN, sasl_username=test Feb 12 19:00:12 svr2 postfix/cleanup: F24009381D5: message-id=<[email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected][email protected] Also I have taken and added irs.gov to the /etc/postfix/local-host-names as well to stop them sending mail with that. But I hate to block all these domains that could potientally come in if there being spoofed. I am also noticing this line in there as well, could you tell me how to fix this please: Feb 12 19:00:27 svr2 postfix/smtp: warning: database /etc/postfix/sasl_passwd.db is older than source file /etc/postfix/sasl_passwd Any help would be appericated.