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
--
Alexei.
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