Strange Qmail error

[DirtyMonkey]

Can anyone help explain the error below?

Why can't Qmail find the domain client.com for anonymous1@client.com when it has successfully found it for anonymous2@client.com, anonymous3@client.com, anonymous4@client.com

Thanks in advance DM.

Hi. This is the qmail-send program at server001.mydomain.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.

<'anonymous1@client.com'>:
Sorry, I couldn't find any host named client.com'. (#5.1.2)

--- Below this line is a copy of the message.

Return-Path: <me@mydomain.com>
Received: (qmail 19641 invoked from network); 11 Aug 2008 20:32:25 +0100
Received: from myisp.com (HELO MYLAPTOP) (212.159.100.10)
by serverip.rackcentre.myhost.com with SMTP; 11 Aug 2008 20:32:14 +0100
From: <me@mydomain.com>
To: <'anonymous1@client.com'>,
<'anonymous3@client.com>,
<anonymous4@client.com>
Cc: "'Anonymous 2'" <anonymous2@client.com>
Subject: FW: INVOICE# ROCKET-00108-07-08
Date: Mon, 11 Aug 2008 20:31:21 +0100
Message-ID: <004d01c8fbe8$e8b946e0$ba2bd4a0$@com>
MIME-Version: 1.0
Content-Type: multipart/mixed;
boundary="----=_NextPart_000_004E_01C8FBF1.4A7DAEE0"
X-Priority: 1 (Highest)
X-MSMail-Priority: High
X-Mailer: Microsoft Office Outlook 12.0
Content-Language: en-gb
Importance: High
Thread-Index: AcjzIdX+Rbe8QKGuRiiOw5u55lXyFgIxOiFw

This is a multipart message in MIME format.

 

[intosh]

Hello,

when you put addresses in your mail client remember to not put that adresses in ' (single apostrophe).

 

[DirtyMonkey]

Nope there are no ' (single quotes) in my address book entries.

 

[intosh]

OK but somehow they apeared in "mail to" form

<'anonymous1@client.com'>:
Sorry, I couldn't find any host named client.com'. (#5.1.2)

 

[fatangel]

From: <me@mydomain.com>
To: <'anonymous1@client.com'>,
<'anonymous3@client.com>,
<anonymous4@client.com>
Cc: "'Anonymous 2'" <anonymous2@client.com>
Subject: FW: INVOICE# ROCKET-00108-07-08

According to the email headers, anonymous1@client.com has the single quotes.

 

[DirtyMonkey]

Weird I don't know how, I sent a subsequent email and it was recieved correctly..?

Never mind, thanks for your imput.

DM.