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Hi jad, which checker is that? Is it open-source? What about performace? Thanks for some information. Tilli

There can't be a way. Mail is delivered via SMTP these days in the internet (see rfc 821, 822), which implements no guarantee for successfull delivery. You can configure sendmail either to deliver or to bounce a message after a specific time, but in case of delivery you can never be sure whether...

I do not know AIX very well, but try: nslookup -querytype=mx yahoo.com If that fails, you have either problems to connect to your dns server or dns is not working (post output in that case). Normally you should get some lines whith some like these somewhere: ... mx2.mail.yahoo.com...

Try this out (with sendmail 8.10 or later): From:123456@yahoo.co.uk OK From:654321@yahoo.com OK From:yahoo.co.uk REJECT From:yahoo.com REJECT Use "OK" to overrule other rules. Order doesn't matter because normally you build a...

Our machines don't deliver local mail, they are for relaying only. So there is no need for elay_local_from. relay_entire_domain is for relaying every mail from or to our local domains, but that works already. We do not use the "relay-domains" file so relay_hosts_only would not have...

Hi, seems normal that you get refused connections in a period of changing ip addresses on your site. Have you tried to change your dns or your /etc/hosts on your mailservers? In case that tells you something... Tilli

Hi leekb, do NOT use an open relay! If your border machine (the one which does NAT) uses dns to resolve hostnames in the internet it should also be able to lookup mx (mail exchange) records. Test this by doing a # nslookup -querytype=mx hotmail.com on that system and you should get a lot of...

Hi Michael, maybe your mails returned in a bounce (as they should after a time if sendmail was unable to deliver). If it was sent by a local user, have a look into /private/var/spool/clientmqueue or /var/spool/clientmqueue. It might be helpful to drop some lines of your sendmail log here. Tilli

Hi, does anyone know how to reject messages from senders claiming to be in one of the domains we do relaying for? I don't see a possible access-db-solution... (not working) example for access.db: Connect:[192.168.0.1] RELAY To:my.domain.com RELAY From:my.domain.com REJECT...