Uni-muenster.de tries to send mail to us: We're returning (using postscreen):
220-mail.charite.de ESMTP 421-4.3.2 All server ports are busy 421 4.3.2 Contact postmas...@charite.de (using a different email address!) for technical assistance. Please provide the following information in your problem report: This error message, time (Oct 21 21:24:31), client (128.176.188.24) and server (mail.charite.de). because at that time our 128 smtpds are all busy! >From my log: Oct 21 21:24:31 mail postfix/postscreen[14632]: PASS OLD [128.176.188.24]:43296 Oct 21 21:24:31 mail postfix/postscreen[14632]: warning: cannot connect to service private/smtpd: Resource temporarily unavailable and in their log they're getting: Oct 21 21:24:31 zivmail postfix/smtp[7663]: C51E4BF414: to=<peter.heuschm...@charite.de>, relay=mail.charite.de[141.42.202.200]:25, delay=6.4, delays=0.27/0.01/6.1/0, dsn=5.5.0, status=bounced (Protocol error: host mail.charite.de[141.42.202.200] refused to talk to me: 220-mail.charite.de ESMTP 421-4.3.2 All server ports are busy 421 4.3.2 Contact postmas...@charite.de (using a different email address!) for technical assistance. Please provide the following information in your problem report: This error message, time (Oct 21 21:24:31), client (128.176.188.24) and server (mail.charite.de). We speak both English and German.) Sending machine ist Postfix-2.3.x Receiving machine is mail.charite.de Postfix-2.9-20111012 Protocol error?? -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de