Stan, Sendmail changed from 8.6 to 8.8.8, if I recall correctly it happened between the 6.4 and 6.5 I/A versions. See the last paragraph of this link for an explaination about what qualified hostnames are and how sendmail deals with it. http://www.sendmail.org/vendor/sun/migration+sun.html Marco. > -----Original Message----- > So I'm geussing that either the version of sendmail, or it's > config files gets chnaged in this upgrade? _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: http://www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave