Sorry it took a while, but Iīve been away for a week. Actually I only got one answer, but it looks like it could work. I wonīt have the hardware for the new Novell servers for another 3 weeks so I havenīt had any chance to try the solution. The original question and the reply follows: Many thanks to Leif ! (... and Stars do GO!) Org. question: >Iīm running a SS5 with Solaris 2.4 as mailserver (Sendmail version 8.6) and DNS for my domain leksand.se. The >network will grow when I connect 3 Novell 4.1x LANs via ISDN to use my Internet router. These LANs will get >their own subdomain mainly for creating a logical email adress. > >What I want is a way to cache the mail for these 3 subdomains (domain1.leksand.se) somewhere and when someone >on one of the subdomains makes the ISDN line go up the Novell server should collect the cached mail and >distribute it locally. What I donīt want is one or more servers pingin eachother to see if thereīs a >connection or not - and I donīt want the ISDN line go up all the time either for delivering mail to the >subdomains. >If it makes my life easier I could consider Windows NT instead of Novell for the subdomains and perhaps an >extra Linux as mailserver/mailcache, but the best would naturally be to keep the stuff Iīve got. I would >appreciate any input on this matter from anyone who thinks he/she has something to add. Answer from leif@netscape.com: Your best bet is probably to upgrade to the new sendmail version, 8.8.x. You can find it at ftp://ftp.sendmail.org/ucb/src/sendmail/sendmail.8.8.4.tar.gz This version has many new features to support queued deliveries. In your case, you'll configure your mail server to alwayes queue mail for you subdomains (domain1.leksand.se). Your Novell machines would then initiate a connection to your mail server every so often, and do an SMTP request like this: Connected to mail.leksand.com. Escape character is '^]'. 220 leksand.com ESMTP Sendmail 8.8.4/8.8.4; Sun, 12 Jan 1997 13:08:53 -0800 EHLO domain1.leksand.com 250-leksand.com Hello domain1.leksand.com [1.2.3.5], pleased to meet you 250-8BITMIME 250-SIZE 250-DSN 250-ONEX 250-ETRN 250-XUSR 250 HELP ETRN domain1.leksand.com 250 Queuing for node domain1.leksand.com started Now your mail server (mail.leksand.com) will start sending the queued messages down to domain1.leksand.com. I don't know anything about Novell, but writing a script that sends the "ETRN" command to the mail server should be really easy. There is even a Perl script in the contrib directory (contrib/etrn.pl), which can be used to do this. So all you need is a Perl binary for your Novell machine. I hope this helps, -- Leif P.s Go Stars!