Idézem/Quoting Sam Varshavchik <mr...@courier-mta.com>:
> Alexei Batyr' writes:
>
>> Sam Varshavchik writes:
>>
>>> SZÉPE Viktor writes:
>>>
>>>> Hello!
>>>>
>>>> Could you help me where is the syntax error in this address?
>>>>
>>>> Jun 6 21:39:09 szerver4 courieresmtpd:
>>>> error,relay=::ffff:195.228.245.161,from=<optimail-%9566%-
>>>> %22342...@optimail.hu>: 517 Syntax
>>>> error.
>>>>
>>>> AFAIK this is a very high volume newsletter.
>>>
>>> Unfortunately, this "high volume newsletter" violates RFC 2822 with its
>>> email address.
>>>
>>>> From section 3.4.1 of RFC 2822:
>>>
>>> addr-spec = local-part "@" domain
>>>
>>> local-part = dot-atom / quoted-string / obs-local-part
>>>
>>> In this case, the "dot-atom" form of local-part applies.
>>>
>>> Section 3.2.4 spcifies dot-atom as follows:
>>>
>>> atext = ALPHA / DIGIT / ; Any character except controls,
>>> "!" / "#" / ; SP, and specials.
>>> "$" / "%" / ; Used for atoms
>>> "&" / "'" /
>>> "*" / "+" /
>>> "-" / "/" /
>>> "=" / "?" /
>>> "^" / "_" /
>>> "`" / "{" /
>>> "|" / "}" /
>>> "~"
>>>
>>> atom = [CFWS] 1*atext [CFWS]
>>>
>>> dot-atom = [CFWS] dot-atom-text [CFWS]
>>>
>>> dot-atom-text = 1*atext *("." 1*atext)
>>>
>>> In other words, the "%" character is a prohibited character in email
>>> addresses.
>>>
>> Hmm, AFAICS "%" explicitly indicated in 3.2.4 as _allowed_ character. I
>> couldn't find in recent logs incoming mail with "%" in address, but this
>> log line proves that courier outgoing smtp module considers such address as
>> valid:
>> courieresmtp: id=1A5BA195.0000000056F2911C.
>> 00003204,from=<eve...@pcweek.ru>,addr=<r.voron...@gs1ru.org>: 250 Requested
>> mail action okay, completed
>
> I read this, initially, as excluding the listed characters, focusing
> on the "except controls, SP, and specials" comment, interpreting
> "specials" as referencing the given list. But on another read, I
> must admit that those characters are allowed.
>
> The actual error here is that % appears next to @, tripping the
> check that special characters may not be consecutive. There are
> reasons for that; namely historic, legacy, address rewriting rules
> (the makepercenthack man page has the details). Don't see any reason
> not to get rid of them, but this won't be a quick fix.
>
> Generally, using special characters, like that, in email addresses
> is not a very good idea.
Thank you for caring about my percent signs.
Could you develop an option for Courier that enables "$" and "%" in
email addresses?
Of course default=disabled.
Thank you!
SZÉPE Viktor
--
+36-20-4242498 s...@szepe.net skype: szepe.viktor
Budapest, III. kerület
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