I still haven't resolved this problem. One correspondent suggested the following test - here it is with output:
Any clues? # sendmail -v -d8.20 -d38.20 -qIi89KZMRf031334 <this is where things go wrong> getcanonname(emailme.net.au), trying files text_getcanonname(emailme.net.au) getcanonname(emailme.net.au), trying dns dns_getcanonname(emailme.net.au, trymx=1) dns_getcanonname: trying emailme.net.au. (AAAA) NO: errno=110, h_errno=2 dns_getcanonname: trying emailme.net.au. (A) YES dns_getcanonname: emailme.net.au getcanonname(emailme.net.au), found getmxrr(emailme.net.au., droplocalhost=1) getmxrr: res_search(emailme.net.au.) failed (errno=110, h_errno=2) <[EMAIL PROTECTED]>... Deferred: Name server: emailme.net.au.: host name lookup failure closemaps: closing host (NULL) closemaps: closing dequote (NULL) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]