Hi, my ISP has changed the mailsystem so that I have to change my configuration too. They sent me an email in which they tell me to send my user-id and password when sending mail. They call it ESMTP. So far I used /usr/local/bin/maildirsmtp ~alias/pppdir alias-ppp- sendmail.neubert.com $IPADDR to send my mail. But if I try this now, I get the following error: maildirserial: info: new/963816027.832.chakoty bounced: 209.231.49.20 said: 553 To send mail, first check your mail with a valid POP account; this prevents unauthorized SPAM relaying. (#5.7.1) Does anybody know how to configure my site to use ESMTP? Kind regards, Tobias