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.
pgp98QofXTl9X.pgp
Description: PGP signature
------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. https://ad.doubleclick.net/ddm/clk/305295220;132659582;e
_______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
