Hi there,

i'm pretty new to this stuff, just tell me if you need more information.

Apr 26 17:15:43 dilia dovecot:
imap(user@domain.de)<78561><rtYxnuHAZoPAqBSC>: Error:
i_stream_seekable_write_failed: close((&sstream->fd)) @
istream-seekable.c:246 failed (fd=21): Bad fi le descriptor Apr 26 17:15:43 dilia dovecot:
imap(user@domain.de)<78561><rtYxnuHAZoPAqBSC>: Panic: file
istream-seekable.c: line 226 (read_from_buffer): assertion failed:
(*ret_r >0) Apr 26 17:15:43 dilia dovecot:
imap(user@domain.de)<78561><rtYxnuHAZoPAqBSC>: Error: Raw backtrace:
/usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7f13aead973b] ->
/usr/lib/dovecot/libdov ecot.so.0(+0xdb7d1) [0x7f13aead97d1] ->
/usr/lib/dovecot/libdovecot.so.0(+0x4a199) [0x7f13aea48199] ->
/usr/lib/dovecot/libdovecot.so.0(+0x4c7cf) [0x7f13aea4a7cf] ->
/usr/lib/dovecot/libdove cot.so.0(+0xee6e2) [0x7f13aeaec6e2] ->
/usr/lib/dovecot/libdovecot.so.0(+0xeeb46) [0x7f13aeaecb46] ->
/usr/lib/dovecot/libdovecot.so.0(+0xe6cd9) [0x7f13aeae4cd9] ->
/usr/lib/dovecot/libdovec ot.so.0(i_stream_get_size+0x2a) [0x7f13aeae5baa] ->
/usr/lib/dovecot/modules/lib20_zlib_plugin.so(+0x417c)
[0x7f13ae80817c] ->
/usr/lib/dovecot/libdovecot-storage.so.0(index_mail_set_seq+0x2 5) [0x7f13aec57eb5] ->
/usr/lib/dovecot/libdovecot-storage.so.0(+0xd19ce) [0x7f13aec5e9ce] ->
/usr/lib/dovecot/libdovecot-storage.so.0(index_storage_search_next_nonblock+0x61)
[0x7f13aec5f0e 1] ->
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonblock+0x28)
[0x7f13aebe7e58] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x55740be9495f] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x55740be9528c] -> dovecot/imap
user@domain.de 192.168.xxx.xxx UID SORT [0x55740be87b7 1] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x55740be8ddc0] -> dovecot/imap
user@domain.de 192.168.xxx.xxx UID SORT [0x55740be8c3f2] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID SORT
[0x55740be8c494] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x55740be8c845] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x55740be8cd6e] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f)
[0x7f13aeaefbef] -> /usr/lib/dovec ot/libdovecot.so.0(io_loop_handler_run_internal+0x136)
[0x7f13aeaf11e6] ->
/usr/lib/dovecot/libdovecot.so.0(io_loop_handler_run+0x4c)
[0x7f13aeaefc8c] -> /usr/lib/dovecot/libdovecot.so.0(io_ loop_run+0x40) [0x7f13aeaefdf0] ->
/usr/lib/dovecot/libdovecot.so.0(master_service_run+0x13)
[0x7f13aea70123] -> dovecot/imap user@domain.de 192.168.xxx.xxx UID
SORT [0x5574 0be7ebf5] -> /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)
[0x7f13ae85709b] Apr 26 17:15:44 dilia dovecot:
imap(user@domain.de)<78561><rtYxnuHAZoPAqBSC>: Fatal: master:
service(imap): child 78561 killed with signal 6 (core dumped)

# 2.3.4.1 (f79e8e7e4): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.4 () # OS: Linux 4.19.0-9-amd64 x86_64 Debian 10.9 # Hostname: dilia.intern.domain.de auth_cache_size = 10 M auth_default_realm = domain.de auth_mechanisms = plain login default_vsz_limit = 1 G disable_plaintext_auth = no imapc_features = " fetch-headers" imapc_host = mail.intern.domain.de imapc_user = %u mail_location = maildir:~/Maildir mail_plugins = zlib acl mail_prefetch_count = 20 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 envir onment mailbox date index ihave duplicate mime foreverypart extracttext namespace { hidden = no ignore_on_failure = no inbox = no list = children location = maildir:%%h/Maildir:INDEX=%h/shared/%%u:CONTROL=%h/shared/%%u prefix = shared/%%u/ separator = / subscriptions = yes type = shared } namespace inbox { hidden = no inbox = yes list = yes location = mailbox Drafts { auto = subscribe special_use = \Drafts } mailbox Junk { auto = subscribe special_use = \Junk } mailbox Sent { auto = subscribe special_use = \Sent } mailbox "Sent Messages" { special_use = \Sent } mailbox Trash { auto = subscribe special_use = \Trash } prefix = INBOX/ separator = / subscriptions = yes type = private }

passdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } plugin { acl = vfile acl_shared_dict = file:/var/lib/dovecot/db/shared-mailboxes.db mail_log_events = delete undelete expunge copy mailbox_delete mailbox_rename mail_log_fields = uid box msgid size sieve = file:~/sieve;active=~/.dovecot.sieve zlib_save = gz zlib_save_level = 6 } protocols = " imap lmtp sieve" service auth { unix_listener /var/spool/postfix/private/auth { mode = 0666 } unix_listener auth-userdb { group = vmail user = vmail } } service imap-login { process_min_avail = 12 service_count = 0 }

service imap { process_limit = 8192 } service lmtp { inet_listener lmtp { address = 127.0.0.1 port = 24 } } service managesieve-login { inet_listener sieve { port = 4190 } inet_listener sieve_deprecated { port = 2000 } } ssl_cert = ALL:!kRSA:!SRP:!kDHd:!DSS:!aNULL:!eNULL:!EXPORT:!DES:!3DES:!MD5:!PSK:!RC4:!ADH:!LOW:!DH@STRENGTH ssl_dh = # hidden, use -P to show it ssl_key = # hidden, use -P to show it ssl_min_protocol = TLSv1.2 ssl_prefer_server_ciphers = yes userdb { driver = prefetch } userdb { args = /etc/dovecot/dovecot-ldap.conf.ext driver = ldap } verbose_proctitle = yes protocol lmtp { mail_plugins = zlib acl sieve } protocol imap { mail_max_userip_connections = 20 mail_plugins = zlib acl imap_zlib imap_acl }

Regards, Thomas