Am 16.05.2014 21:03, schrieb Oscar del Rio: > On 05/13/14 03:02 PM, Stephan Bosch wrote: >> >> Use of NULL envelope sender is generally recommended to prevent mail >> loops > > Unfortunately, many servers out there reject emails with NULL sender. > Some recent examples (real server names edited) : > > ... while talking to antispam1.*.ca.: > >>> DATA > <<< 550 Empty envelope senders not allowed > > ... while talking to smtp.*.net.: > >>> MAIL From:<> SIZE=1096 > <<< 550 5.1.0 <> Blank From: addresses are not allowed. Please provide > a valid From: IB501 <http://x.co/srbounce> > > ... while talking to spam.*.edu.cn.: > >>> DATA > <<< 553 Requested action not taken: NULL sender is not allowed > > ... while talking to mail.*.co.kr.: > >>> MAIL From:<> > <<< 501 bad sender address expression. > > ... while talking to antispam.*.com.: > >>> MAIL From:<> > <<< 501 Syntax error in address
you will find any kind of bad config in www if you search for it http://www.postfix.org/postconf.5.html ... Beware, some sites reject mail from <>, even though RFCs require that such addresses be accepted. ... Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
