Jerome Santini:
[ Charset ISO-8859-1 unsupported, converting... ]
> Hello
>
> It seems that postfix (I'm using the postfix-19991231-pl13 version) refuse
> to deliver mail to adresses beginning with a dash :
>
> Jan 4 08:20:10 bison postfix/qmgr[414]: 0932F156C3:
> to=<-xxx.xxxwanadoo.fr>, relay=none, delay=4, status=bounced (invalid
> recipient syntax: "-xxx.xxxwanadoo.fr")
>
> Re-reading the RFC 822, I didn't see anything describing this adress as
> invalid.
>
> Do you think this should be described as a bug of postfix, or of wanadoo ?

This is documented.

On UNIX systems, allowing mail addresses to start with - is a
security problem waiting to happen.

Right now, Postfix allows no - at the start of any email address.
Setting allow_min_user=yes allows them globally.

In a future version, that switch may be made more configurable,
for example, disallow -userdomain for delivery to external commands
where they can do serious harm, but allow it for delivery via SMTP
where it is no longer my problem.

        Wietse

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