Answering to myself, 

The issue was as a result of a config parameter for SOGo:

Changed 
NGImap4ConnectionStringSeparator = "/";

to

NGImap4ConnectionStringSeparator = ".";

and the problem is solved. 


On Fri, 30 Oct 2020 at 11:43, Odhiambo Washington <odhiambo@gmail.com> wrote:
Hello good people,

I have dovecot- 2.3.7.2 (Ubuntu  Ubuntu 20.04.1 LTS) running fine.
However, I have a hitch with mail filtering.

Using SOGo as the webmail UI, I created a filter rule which resulted into the rule below:

require ["fileinto"];
if allof (address :contains "from" "odhiambo") {
    fileinto "INBOX/Odhiambo";
}

However, the test mail I sent did not end up the folder expected.

lda.log contains this info:
Oct 30 07:39:07 lda(wash@mydomain)<2415266><tSKSHhvDm1+i2iQA9H6eMA>: Info: sieve: msgid=<CAAdA2WNqXpG1qmOmKp_pJPS6iQrEPeS6=vM_=o8UnvR152x54Q@mail.gmail.com>: stored mail into mailbox 'INBOX'
Oct 30 07:39:07 lda(wash@mydomain)<2415266><tSKSHhvDm1+i2iQA9H6eMA>: Info: sieve: Execution of script /var/spool/virtual/mydomain/wash/.dovecot.sieve failed, but implicit keep was successful (user logfile /var/spool/virtual/mydomain/wash/.dovecot.sieve.log may reveal additional details)

And the .dovecot.sieve.log contains:
sieve: info: started log at Oct 30 07:39:07.
error: msgid=<CAAdA2WNqXpG1qmOmKp_pJPS6iQrEPeS6=vM_=o8UnvR152x54Q@mail.gmail.com>: failed to store into mailbox 'INBOX/Odhiambo': Invalid mailbox name: Name must not have '/' characters.

What might be the problem here??


dovecot -n output is below:

# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 ()
# OS: Linux 5.4.0-29-generic x86_64 Ubuntu 20.04.1 LTS ext4
# Hostname: jp.mydomain
auth_mechanisms = plain login
auth_socket_path = /var/run/dovecot/auth-userdb
debug_log_path = /var/log/dovecot/debug.log
default_login_user = dovecot
default_vsz_limit = 2 G
disable_plaintext_auth = no
first_valid_uid = 110
hostname = gw.mydomain
info_log_path = /var/log/dovecot/info.log
log_path = /var/log/dovecot/error.log
mail_gid = Debian-exim
mail_location = maildir:/var/spool/virtual/%d/%n/Maildir:INDEX=/var/spool/virtual/indexes/%d/%1n/%n
mail_plugins = fts
mail_privileged_group = mail
mail_server_admin = postmaster@mydomain
mail_uid = Debian-exim
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext imapsieve vnd.dovecot.imapsieve
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
plugin {
  fts_autoindex = yes
  fts_autoindex_exclude = \Junk
  fts_autoindex_exclude2 = \Trash
  fts_autoindex_exclude3 = \Drafts
  fts_autoindex_exclude4 = \Spam
  fts_enforced = yes
  imapsieve_mailbox1_before = file:/usr/lib/dovecot/sieve/report-spam.sieve
  imapsieve_mailbox1_causes = COPY
  imapsieve_mailbox1_name = Spam
  imapsieve_mailbox2_before = file:/usr/lib/dovecot/sieve/report-ham.sieve
  imapsieve_mailbox2_causes = COPY
  imapsieve_mailbox2_from = Spam
  imapsieve_mailbox2_name = *
  plugin = fts managesieve sieve
  sieve = file:~/sieve;active=~/.dovecot.sieve
  sieve_execute_bin_dir = /usr/lib/dovecot/sieve-execute
  sieve_filter_bin_dir = /usr/lib/dovecot/sieve-filter
  sieve_global_extensions = +vnd.dovecot.pipe +vnd.dovecot.environment
  sieve_pipe_bin_dir = /usr/lib/dovecot/sieve
  sieve_plugins = sieve_imapsieve sieve_extprograms
}
postmaster_address = postmaster@mydomain
protocols = imap lmtp sieve
service auth {
  unix_listener auth-client {
    mode = 0600
    user = Debian-exim
  }
  unix_listener auth-userdb {
    group = Debian-exim
    user = Debian-exim
  }
}
service stats {
  unix_listener stats-reader {
    user = Debian-exim
  }
  unix_listener stats-writer {
    user = Debian-exim
  }
}
service submission-login {
  inet_listener submission {
    port = 2587
  }
}
ssl_cert = </etc/letsencrypt/live/mydomain/fullchain.pem
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
  args = /etc/dovecot/dovecot-sql.conf.ext
  driver = sql
}
protocol lmtp {
  info_log_path = /var/log/dovecot/lmtp.log
  log_path = /var/log/dovecot/lmtp-errors.log
  mail_plugins = fts sieve
  postmaster_address = postmaster@mydomain
}
protocol lda {
  info_log_path = /var/log/dovecot/lda.log
  log_path = /var/log/dovecot/lda-errors.log
  mail_plugins = fts sieve
}

--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft.", grep ^[^#] :-)


--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
"Oh, the cruft.", grep ^[^#] :-)