retrieval error (offered message xyz but failed to provide it)

Hello!

After many years I concluded that the getmail should be required part
fro the optimal email workflow and now I want to migrate my Gnus/nnimap
setup to Gnus/nnmaildir along with bogofilter/Clamav scanning and
maildrop delivery.

However, often I experience that during the retrieval I get the messages
like:

Retrieval error: server for
SimpleIMAPSSLRetriever:[email protected]:993
is broken; offered message 1448439752/1724 but failed to provide it.
Please notify the administrator of the server.  Skipping message...

I was looking in the list's archives, but it looked as it was an old
getmail bug which should not be present in the latest getmail release?


Here is the --dump output when invoked with one of the several user.rc
files:

$ getmail --dump --rcfile=gour.rc
getmail version 5.6
Copyright (C) 1998-2012 Charles Cazabon.  Licensed under the GNU GPL version 2.
getmail configuration:
  getmail version 5.6
  Python version 2.7.15+ (default, Aug 31 2018, 11:56:52) 
[GCC 8.2.0]
  retriever: SimpleIMAPSSLRetriever(ca_certs="None", certfile="None",
  getmaildir="/home/gour/.getmail/", keyfile="None",
  mailboxes="('ALL',)", move_on_delete="None", password="*",
  password_command="()", port="993", record_mailbox="True",
  server="mail.webfaction.com", ssl_cert_hostname="None",
  ssl_ciphers="None",
  ssl_fingerprints="('3f9c1b1598dfbe93cd689ca64f0d6104961ceb9ad1bc053a21d14b746a311e85',)",
  ssl_version="None", timeout="180", use_cram_md5="False",
  use_kerberos="False", use_peek="True", use_xoauth2="False",
  username="gour_atmarama_com")
  filter: Filter_classifier(allow_root_commands="False",
  arguments="('--stdout', '--no-summary', '--infected', '-')",
  command="clamdscan", exitcodes_drop="('99', '100')",
  exitcodes_keep="('0', '1')", group="None",
  ignore_header_shrinkage="False", ignore_stderr="False",
  path="/usr/bin/clamdscan", unixfrom="False", user="None")
  filter: Filter_external(allow_root_commands="False", arguments="('-R',
  'X-getmail-filter-classifier:', 'X-ClamAV-filter:')",
  command="reformail", exitcodes_drop="('99', '100')",
  exitcodes_keep="('0',)", group="None",
  ignore_header_shrinkage="False", ignore_stderr="False",
  path="/usr/bin/reformail", unixfrom="False", user="None")
  filter: Filter_classifier(allow_root_commands="False",
  arguments="('-p', '-e')", command="bogofilter", exitcodes_drop="('99',
  '100')", exitcodes_keep="('0',)", group="None",
  ignore_header_shrinkage="False", ignore_stderr="False",
  path="/usr/bin/bogofilter", unixfrom="False", user="None")
  destination: MDA_external(allow_root_commands="False",
  arguments="('-f', '%(sender)', '~/.getmail/gour.filter')",
  command="maildrop", group="None", ignore_stderr="False",
  path="/usr/bin/maildrop", unixfrom="False", user="None")
  options:
    delete : False
    delete_after : 7
    delete_bigger_than : 0
    delivered_to : False
    fingerprint : False
    logfile : logfile(filename="~/.getmail/gour.log")
    max_bytes_per_session : 0
    max_message_size : 0
    max_messages_per_session : 0
    message_log : ~/.getmail/gour.log
    message_log_syslog : False
    message_log_verbose : True
    read_all : False
    received : False
    verbose : 1

I'm running getmail on my deskop machine using Debian (Sid) and user's
passwords are retrieved from the GNOME keyring.

Any hint?


Sincerely,
Gour

-- 
The senses, the mind and the intelligence are the sitting places
of this lust. Through them lust covers the real knowledge of the
living entity and bewilders him.