Yes, but you can't force another mail server to check SPF, and a lot don't...or poorly implement it at a corporate level so that most email coming from them fails SPF. Also, his question seemed directed at detecting spam forging his domain that was coming into his mail server.
Darin. ----- Original Message ----- From: "Eric Shanbrom" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, June 12, 2005 12:37 AM Subject: Re: [IMail Forum] Mail send from other IP pretending to be our domain Actually, if you publish SPF records for your domain AND the receiving mail server is checking SPF records then the remote mail server will know that the message came from an IP Address that you haven't specified as on authorized to send mail for your domain. From there it is up to the m to decide what to do with it Eric S Darin Cox wrote: >You can't keep them from forging your domain name, but you can use SPF to >detect spammers forging your domain name when they send to you. > >More info at http://spf.pobox.com > >Darin. > > >----- Original Message ----- >From: "copacs" <[EMAIL PROTECTED]> >To: <[email protected]> >Sent: Friday, June 10, 2005 5:58 PM >Subject: [IMail Forum] Mail send from other IP pretending to be our domain > > >Can I get an explanation how I can stop an other IP from pretending to be my >domain and send mail to my users. > >Our IP: 216.152.171.37 and >IP 66.205.12.246 is NOT curlink.com > >Kenneth > >=== Following is from my log file > >06:10 16:06 SMTPD(f2d9014f00ae1f90) [216.152.171.37] connect 66.205.12.246 >port 15242 >06:10 16:06 SMTPD(f2d9014f00ae1f90) [66.205.12.246] EHLO curlink.com >06:10 16:06 SMTPD(f2d9014f00ae1f90) [66.205.12.246] MAIL >FROM:<[EMAIL PROTECTED]> >06:10 16:06 SMTPD(f2d9014f00ae1f90) [66.205.12.246] RCPT >TO:<[EMAIL PROTECTED]> > > > >To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > > >To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html >List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ >Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
