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    <p>Hi,</p>
    <p>on dovecot 2.3.16 with delivery via LMTP I found many of this
      error when a user have the mailbox full and personal sieve rules:</p>
    <p>- lmtp.log:<br>
      <br>
      Sep 14 09:58:27 pop05 dovecot: lmtp(<a class="moz-txt-link-abbreviated" href="mailto:user1@company.com">user1@company.com</a>)
      session=<eAjRDSNWQGFCaQAAP27dBg>: sieve: deliverytime=122,
      msgid=<a class="moz-txt-link-rfc2396E" href="mailto:000601d7a8f8$fc350d50$f49f27f0$@company.com"><000601d7a8f8$fc350d50$f49f27f0$@company.com></a>,
      <a class="moz-txt-link-abbreviated" href="mailto:sender=user2@company.com">sender=user2@company.com</a>, <a class="moz-txt-link-abbreviated" href="mailto:from=user2@company.com">from=user2@company.com</a>, subject="my
      subject 1": fileinto action: failed to store into mailbox
      'INBOX/Personale': Quota exceeded (mailbox for user is full)<br>
      Sep 14 09:58:27 pop05 dovecot: lmtp(<a class="moz-txt-link-abbreviated" href="mailto:user1@company.com">user1@company.com</a>)
      session=<eAjRDSNWQGFCaQAAP27dBg>: sieve: deliverytime=122,
      msgid=<a class="moz-txt-link-rfc2396E" href="mailto:000601d7a8f8$fc350d50$f49f27f0$@company.com"><000601d7a8f8$fc350d50$f49f27f0$@company.com></a>,
      <a class="moz-txt-link-abbreviated" href="mailto:sender=user2@company.com">sender=user2@company.com</a>, <a class="moz-txt-link-abbreviated" href="mailto:from=user2@company.com">from=user2@company.com</a>, subject="my
      subject 1": failed to store into mailbox 'INBOX': Quota exceeded
      (mailbox for user is full)<br>
      Sep 14 09:58:27 pop05 dovecot: lmtp(<a class="moz-txt-link-abbreviated" href="mailto:user1@company.com">user1@company.com</a>)
      session=<eAjRDSNWQGFCaQAAP27dBg>: sieve: Execution of script
      /home/vmail/domains/company.com/user1/.dovecot.sieve failed with
      unsuccessful implicit keep (user logfile
      /home/vmail/domains/company.com/user1/.dovecot.sieve.log may
      reveal additional details)</p>
    <p>Sep 14 09:58:27 pop05 dovecot: lmtp(26946): Panic: file
      mail-user.c: line 229 (mail_user_deinit): assertion failed:
      ((*user)->refcount == 1)</p>
    <p>Sep 14 09:58:27 pop05 dovecot: lmtp(26946): Error: Raw backtrace:
      /usr/lib64/dovecot/libdovecot.so.0(backtrace_append+0x42)
      [0x7f52dfb4e632] ->
      /usr/lib64/dovecot/libdovecot.so.0(backtrace_get+0x1e)
      [0x7f52dfb4e73e] ->
      /usr/lib64/dovecot/libdovecot.so.0(+0xf66fe) [0x7f52dfb5c6fe]
      -> /usr/lib64/dovecot/libdovecot.so.0(+0xf67a1)
      [0x7f52dfb5c7a1] ->
      /usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [<br>
      0x7f52dfaaba18] ->
      /usr/lib64/dovecot/libdovecot-storage.so.0(+0x57567)
      [0x7f52dfe79567] -> dovecot/lmtp [10.0.2.26
      DATA](lmtp_local_data+0x4dc) [0x55e09f333e2c] -> dovecot/lmtp
      [10.0.2.26 DATA](client_default_cmd_data+0x18b) [0x55e09f33273b]
      -> dovecot/lmtp [10.0.2.26 DATA](cmd_data_continue+0x204)
      [0x55e09f3324d4] ->
      /usr/lib64/dovecot/libdovecot.so.0(+0x5fe64) [0x7f52dfac5e64]
      -> /usr/li<br>
      b64/dovecot/libdovecot.so.0(io_loop_call_io+0x65) [0x7f52dfb74ad5]
      ->
      /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x12b)
      [0x7f52dfb7649b] ->
      /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x59)
      [0x7f52dfb74bd9] ->
      /usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x38)
      [0x7f52dfb74e18] ->
      /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13)
      [0x7f52dfadddf3] -> dovecot/lmtp [10.0.2.26 DATA](main+0x20b)
      [0x55e09f330f0b] -> /lib64/libc.so.6(__libc_start_main+0xf5)
      [0x7f52df6ba555] -> dovecot/lmtp [10.0.2.26 DATA](+0x6041)
      [0x55e09f331041]</p>
    <p>Sep 14 09:58:27 pop05 dovecot: lmtp(26946): Fatal: master:
      service(lmtp): child 26946 killed with signal 6 (core dumps
      disabled - <a class="moz-txt-link-freetext" href="https://dovecot.org/bugreport.html#coredumps">https://dovecot.org/bugreport.html#coredumps</a>)<br>
      <br>
      - sieve.log:<br>
      <br>
      sieve: info: started log at 2021-09-14 10:25:54 +0200.<br>
      error: deliverytime=8,
      msgid=<a class="moz-txt-link-rfc2396E" href="mailto:49ef01d7a942$2168a200$6439e600$@company.com"><49ef01d7a942$2168a200$6439e600$@company.com></a>,
      <a class="moz-txt-link-abbreviated" href="mailto:sender=sender1@company.com">sender=sender1@company.com</a>, <a class="moz-txt-link-abbreviated" href="mailto:from=sender1@company.com">from=sender1@company.com</a>, subject="I:
      Undelivered Mail Returned to Sender": fileinto action: failed to
      store into mailbox 'INBOX/Comunicazioni': Quota exceeded (mailbox
      for user is full).<br>
      error: deliverytime=9,
      msgid=<a class="moz-txt-link-rfc2396E" href="mailto:49ef01d7a942$2168a200$6439e600$@company.com"><49ef01d7a942$2168a200$6439e600$@company.com></a>,
      <a class="moz-txt-link-abbreviated" href="mailto:sender=sender1@company.com">sender=sender1@company.com</a>, <a class="moz-txt-link-abbreviated" href="mailto:from=sender1@company.com">from=sender1@company.com</a>, subject="I:
      Undelivered Mail Returned to Sender": failed to store into mailbox
      'INBOX': Quota exceeded (mailbox for user is full).<br>
    </p>
    <p>Hope it can be fixed,</p>
    <p>Thanks<br>
    </p>
    <pre class="moz-signature" cols="72">-- 
Alessio Cecchi
Postmaster @ <a class="moz-txt-link-freetext" href="http://www.qboxmail.it">http://www.qboxmail.it</a>
<a class="moz-txt-link-freetext" href="https://www.linkedin.com/in/alessice">https://www.linkedin.com/in/alessice</a></pre>
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