Hi, Max -
If from your error message you mean that the RFC5322.From header of the
message reads
From: CEX.IO Mailer [nore...@cex.io] <nore...@cex.io>
then yes, I think it is expected behaviour as the header you give is
syntactically invalid according to RFC 5322:
from = "From:" mailbox-list CRLF
mailbox-list = (mailbox *("," mailbox)) / obs-mbox-list
mailbox = name-addr / addr-spec
name-addr = [display-name] angle-addr
display-name = phrase
phrase = 1*word / obs-phrase
word = atom / quoted-string
atom = [CFWS] 1*atext [CFWS]
atext = ALPHA / DIGIT / ; Printable US-ASCII
"!" / "#" / ; characters not including
"$" / "%" / ; specials. Used for atoms.
"&" / "'" /
"*" / "+" /
"-" / "/" /
"=" / "?" /
"^" / "_" /
"`" / "{" /
"|" / "}" /
"~"
Following the above through you can see that the *display-name* (the bit
between the "From:" and the "<nore...@cex.io>") is composed of a *phrase*,
which is made up of one or more *words*, each of which is either an *atom* or
a *quoted-string*.
An *atom* is composed of one or mote *atext* characters, and the
*atext* characters
do not include "." or "[" or "@" or "]" — all of which are present in the
sample you give.
Because of this the display-name should instead be a quoted string, meaning
the header should read:
From: "CEX.IO Mailer [nore...@cex.io]" <nore...@cex.io>
So congratulations: your requirement that the RFC5322.From header be
syntactically correct did its job and complained about one that isn't. :-)
(If the From header actually has some other value please post it here so we
can check it, rather than trying to guess it from the error logged.)
Cheers,
Mike B-)
On 13 April 2017 at 14:45, Max Kostikov via Exim-users <exim-users@exim.org>
wrote:
> Hi!
>
> I just got negative result on ACL on "verify = header_syntax" check with
> this incoming mail From field
>
>> missing or malformed local part (expected word or "<"): failing address
>> in "From:" header is: CEX.IO Mailer [nore...@cex.io] <nore...@cex.io>
>>
> Is this Exim's behaviour is correct?
>
> --
> With best regards,
> Max Kostikov
>
> BBM: 24CA5DF8 | W: https://kostikov.co
>
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