[quote user="Thomas R. Stephenson"]> Hi,
Over 99% of the time you really need to use session logging to really determine why you got this fatal error.  There is something in the SMTP headers that is wrong and not the message body in most cases. 
[/quote]

Thank you, Thomas. I will switch on session logging and report later on about the results.

Regards,

Stefan

Hi,

Using the german version of Pegasus 4.41, occasionally I started to experince problems sending emails containing attachments. After stating "Message was sent", an email comes back with the following content: 

Die Zustellung der folgenden Nachricht ist aus einem der folgenden Gruende, den entweder das Zustellungssystem auf Ihrem
Relais-Server oder das lokale TCP/IP-Transportmodul berichtet hat, nicht zustellbar:

   501 Syntax Error
   501 Syntax Error

Nachfolgend Ihre fehlgeschlagene Nachricht:
--------------------------------------------------------

X-PM-Identity: <Default>
From: XXX.YYY@allesfair.de>
Organization: 
To: ZZZZZ, RRR
Date: Fri, 05 Dec 2008 16:40:24 +0100
MIME-Version: 1.0
Content-type: Multipart/Mixed; boundary=Message-Boundary-3391
Subject: XYZ
Message-ID: <49395978.17531.21FA67@XXX.YYY.allesfair.de>
Priority: normal
X-mailer: Pegasus Mail for Windows (4.41, DE v4.41 R1)


--Message-Boundary-3391
Content-type: text/plain; charset=ISO-8859-1
Content-transfer-encoding: Quoted-printable
Content-description: Mail message body

CONTENT

--Message-Boundary-3391
Content-type: text/plain; charset=ISO-8859-1
Content-transfer-encoding: Quoted-printable
Content-disposition: inline
Content-description: Attachment information.

The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any another MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- Datei Information/File information -----------
     Datei/File:  ABC.jpg
     Datum/Date:  2 Dec 2008, 19:46
     Gr=F6=DFe/Size:  99259 bytes.
     Typ/Type:    JPEG-image

--Message-Boundary-3391
Content-type: Image/JPEG; name="ABC.jpg"
Content-disposition: attachment; filename="ABC.jpg"
Content-transfer-encoding: BASE64

Can anybody help?

 Kind regards,

Stefan

[quote]To: ZZZZZ, RRR[/quote]

I don't know if you've munged proper email addresses or not, but if these aren't resolvable that would cause a problem.

 [quote] ---- Datei Information/File information -----------[/quote]

Personally, I would remove the attachment information (Tools / Options / Sending mail - check 'Don't send attachment information...) although I don't think it has any bearing on this error.

> Hi,
>
> Using the german version of Pegasus 4.41, occasionally I started to
> experince problems sending emails containing attachments. After
> stating "Message was sent", an email comes back with the following
> content:
>  
> Die Zustellung der folgenden Nachricht ist aus einem der folgenden
> Gruende, den entweder das Zustellungssystem auf Ihrem
> Relais-Server oder das lokale TCP/IP-Transportmodul berichtet hat,
> nicht zustellbar:

    
The delivery of the following message is one of the following reasons, either the delivery system on your
Relay server or the local TCP/IP transport module has reported, failed:

>    501 Syntax Error
>    501 Syntax Error

Over 99% of the time you really need to use session logging to really determine why you got this fatal error.  There is something in the SMTP headers that is wrong and not the message body in most cases. 

[quote user="PaulW"]

[quote]To: ZZZZZ, RRR[/quote]

I don't know if you've munged proper email addresses or not, but if these aren't resolvable that would cause a problem.

[/quote]

I just replaced the used alias by the capital letters, there was a proper email address behind.

[quote user="PaulW"]

 [quote] ---- Datei Information/File information -----------[/quote]

Personally, I would remove the attachment information (Tools / Options / Sending mail - check 'Don't send attachment information...) although I don't think it has any bearing on this error.

[/quote]

Thank you for your suggestion, I will try out.

Regards,

Stefan