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SMTP Error 501 Syntax Error

Posted on 2004-11-18
Medium Priority
Last Modified: 2010-05-18
Does the following error pertain to a specific part of an email message, like the from or reply to address, or the message content, or can it be triggered from anywhere within the message you are sending?
501 Syntax error: Line too long line by itself
Question by:wyogirl77
  • 2
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LVL 11

Expert Comment

ID: 12619914
Greetings wyogirl77,

According to the SMTP, the following can cause a 500 or 501 error message (line/path too long)

            text line

               The maximum total length of a text line including the
               <CRLF> is 1000 characters (but not counting the leading
               dot duplicated for transparency).

            recipients buffer

               The maximum total number of recipients that must be
               buffered is 100 recipients.


Author Comment

ID: 12620327
Thank you for the information, does that mean that line that is causing the problem can occur anywhere in the entire message, also this email is only being sent to one recipient at a time so don't think the problem is with the more than 100 recipients.
Thank you
LVL 11

Accepted Solution

YohanShminge earned 200 total points
ID: 12620504
Yes, I would think that any line could cause this problem.

Expert Comment

ID: 12623103
Hi there
501 Syntax error in parameters or arguments
Indicates possible poor (noisy dialup) or an intermittent drop in network line connection that caused your mail client to send erroneous command to the mail server.

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Author Comment

ID: 12631883
Yohan thanks for the info it was part of my plain text part of the message.

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