imaplib send problem on BSD-style OSs

Piers Lauder piers at
Wed Nov 28 02:04:52 CET 2001

On Tue, 27 Nov 2001 13:50:47 -0800, Douglas Wiegley wrote:
  > Hello.  I'm not sure if this is the right place to address 
  > this email, so please let me know if I should be sending this 
  > elsewhere (found your email address at the top of
  > Having a slight problem with the imaplib.append() function 
  > with large messages.  Basically, this line:
  > 636:    self.sock.send('%s%s' % (data, CRLF))
  > doesn't always write all of the data and instead returns a 
  > number of bytes that is less than what you give it (similar 
  > to unix send()).  I ended up needing a small while loop that 
  > calls send multiple times to ensure that all the data is 
  > sent...
  > This is on FreeBSD 4.3.  Please let me know if I'm doing 
  > something wrong...
  > doug

No, it's a bug/feature in the socket module - hopefully fixed in a future
release.  For an immediate work-around, sub-class IMAP4 and override
with the following version of send:

import imaplib
class IMAP4(imaplib.IMAP4):

	def send(self, data):
                """Send data to remote."""
                bytes = len(data)
                while bytes > 0:
                        sent = self.sock.send(data)
                        if sent == bytes:
                                break   # avoid copy
                        data = data[sent:]
                        bytes = bytes - sent

Hope that helps...

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