https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238314#M52068 Hi<BR /><BR />Good morning all.<BR /><BR />I used to get DSN (delivery status notification) alert, just like as below.<BR /><BR />“dsn=5.7.1, stat=User unknown”<BR /><BR />Could some give me more details about, list of DSN error code and description. I believe there are list of DSN which describe about it functions.<BR /> Wed, 05 May 2010 04:43:11 GMT bullz 2010-05-05T04:43:11Z https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238314#M52068 Hi<BR /><BR />Good morning all.<BR /><BR />I used to get DSN (delivery status notification) alert, just like as below.<BR /><BR />“dsn=5.7.1, stat=User unknown”<BR /><BR />Could some give me more details about, list of DSN error code and description. I believe there are list of DSN which describe about it functions.<BR /> Wed, 05 May 2010 04:43:11 GMT https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238314#M52068 bullz 2010-05-05T04:43:11Z https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238315#M52069 The authoritative list is RFC 3463.<BR /><BR /><A href="http://tools.ietf.org/html/rfc3463" target="_blank">http://tools.ietf.org/html/rfc3463</A><BR /><BR />MK Wed, 05 May 2010 05:09:42 GMT https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238315#M52069 Matti_Kurkela 2010-05-05T05:09:42Z https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238316#M52070 Thanx Thu, 06 May 2010 02:23:01 GMT https://community.hpe.com/t5/operating-system-linux/dsn-mail-issue-on-linux/m-p/5238316#M52070 bullz 2010-05-06T02:23:01Z