Fatal: block_alloc() : Out of memory

[Andreas]

Hallo,

ich sehe gerade immer wieder folgende Meldung in der mail.log:

mx dovecot: imap(wh at example.tld)<2510><aiNXwKS9YeG8wLvW>: Fatal: 
block_alloc(33554432): Out of memory
und

mx dovecot: imap(wh at example.tld)<2510><aiNXwKS9YeG8wLvW>: Error: Raw 
backtrace: /usr/lib/dovecot/libdovecot.so.0(+0xdb73b) [0x7f451b8a273b] -> /
usr/lib/dovecot/libdovecot.so.0(+0xdb7d1) [0x7f451b8a27d1] -> /usr/lib/
dovecot/libdovecot.so.0(+0x4a37b) [0x7f451b81137b] -> /usr/lib/dovecot/
libdovecot.so.0(+0x4df59) [0x7f451b814f59] -> /usr/lib/dovecot/libdovecot.so.
0(+0xfa73d) [0x7f451b8c173d] -> /usr/lib/dovecot/libdovecot.so.
0(p_strdup+0x2e) [0x7f451b8d314e] -> /usr/lib/dovecot/libdovecot-storage.so.
0(maildir_uidlist_sync_next_uid+0x35d) [0x7f451b9dff7d] -> /usr/lib/dovecot/
libdovecot-storage.so.0(maildir_uidlist_sync_next+0x20) [0x7f451b9e0140] -> /
usr/lib/dovecot/libdovecot-storage.so.0(+0x87825) [0x7f451b9dd825] -> /usr/
lib/dovecot/libdovecot-storage.so.0(+0x88577) [0x7f451b9de577] -> /usr/lib/
dovecot/libdovecot-storage.so.0(+0x88937) [0x7f451b9de937] -> /usr/lib/
dovecot/libdovecot-storage.so.0(maildir_storage_sync_force+0x39) 
[0x7f451b9dea29] -> /usr/lib/dovecot/libdovecot-storage.so.
0(maildir_file_do+0xe6) [0x7f451b9e3036] -> /usr/lib/dovecot/libdovecot-
storage.so.0(+0x826d2) [0x7f451b9d86d2] -> /usr/lib/dovecot/libdovecot-
storage.so.0(mail_get_hdr_stream_because+0x5d) [0x7f451b9a2fbd] -> /usr/lib/
dovecot/libdovecot-storage.so.0(index_mail_get_header_stream+0x1a0) 
[0x7f451ba1de80] -> /usr/lib/dovecot/libdovecot-storage.so.
0(mail_get_header_stream+0x5d) [0x7f451b9a2e1d] -> /usr/lib/dovecot/
libdovecot-storage.so.0(imap_msgpart_open+0x552) [0x7f451ba5bc22] -> dovecot/
imap(+0x232dc) [0x55f52a25f2dc] -> dovecot/imap(+0x216e2) [0x55f52a25d6e2] -> 
dovecot/imap(imap_fetch_more+0x39) [0x55f52a25e7b9] -> dovecot/
imap(cmd_fetch+0x337) [0x55f52a24fc07] -> dovecot/imap(command_exec+0x70) 
[0x55f52a25bdc0] -> dovecot/imap(+0x1e3f2) [0x55f52a25a3f2] -> dovecot/
imap(+0x1e494) [0x55f52a25a494] -> dovecot/imap(client_handle_input+0x1b5) 
[0x55f52a25a845] -> dovecot/imap(client_input+0x7e) [0x55f52a25ad6e] -> /usr/
lib/dovecot/libdovecot.so.0(io_loop_call_io+0x6f) [0x7f451b8b8bef]
Mar 16 11:23:06 mx dovecot: imap(wh at example.tld)<2510><aiNXwKS9YeG8wLvW>: 
Fatal: master: service(imap): child 2510 returned error 83 (Out of memory 
(service imap { vsz_limit=256 MB }, you may need to increase it) - set 
CORE_OUTOFMEM=1 environment to get core dump)


Was ist da los? Stimmt da das Quota des Benutzers nicht oder ist die 
Festplatte kaputt?
Ich habe Debain Buster mit aktuellem Postfix und Dovecot drauf.

Beste Grüße

Andreas
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