Hi Marc, thanks for your quick reply.
Am Montag, 17. September 2018, 13:01:11 CEST schrieb Marc Haber: > Hi, > > please feel free to do a local override of the macro. How to do this is > explained in the package docs. That is exactly what I attempted by adding # accept % in email addresses (local part, i.e. not domain) /etc/exim4/conf.d/main/00_localconfig I hope that is the way it is intended by the exim4 Debian developers. > Andreas might revise the default in the > package, if it were my decision, I wouldn't change this, even if in > these days where explicit SMTP routing is not even used any more by > spammers. Here I probably have not enough knowledge... >From what I understand from RFC2822 the % is a character like any other >character in the alphabet for the local-part https://tools.ietf.org/html/rfc2822#section-3.4.1 https://tools.ietf.org/html/rfc2822#section-3.2.4 Why is there any disadvantage to allow it? I particular, I do not understand the spam risk you mention and also Google did not help me :-/ ... Could you give me a pointer to more details? In particular do I carry a SPAM risk if I do the local modification to accept the % sign? > > Please also note that it is clearly documented that this rule blocks > addresses that are RFC-valid. There are people which advise the opposite https://archive.fosdem.org/2018/schedule/event/email_address_quiz/ but this is beyond my expertise to judge what are the implications there.... Thanks again for your quick response Rainer -- Rainer Dorsch http://bokomoko.de/