On 22/07/13 05:52, Erik Schorr wrote:
> Occasionally, I'm seeing messages get stuck in queue because the
> submitting client program appears to be sending the envelope FROM
> address enclosed in double-quotes, such as: <"username@???">.
Not legal per rfc5321, 4.1.2
> Is there a way to display a meaningful error to the client when Exim
> sees a username with the offending pattern, similar to the first 501
> error shown above, or, "501 #5.1.3 Sender FROM address is malformed or
> has extraneous quotes"? Simply relying on setting
> sender_unqualified_hosts wouldn't be ideal because the error it shows to
> the client is too generic. I'd ideally like the client to see an error
> message that specifically explains that using double quotes in the From
> address is not permitted.
Sure, just match the pattern, set a "message", and deny in your RCPT ACL.
>
> Is there ever a time when double quotes are actually needed for the
> local portion of an envelope FROM address?
Yes. Local-parts can, for instance, have embedded spaces (yuk).
--
Cheers,
Jeremy
