Package: cyrus-imapd Version: 3.2.0-5~bpo10+1 Followup-For: Bug #961562 Hi, same problem here.
/var/log/exim4/mainlog 2020-05-28 08:32:03 1jeC5C-0002F9-SB == assiste...@resnovae.it R=local_user T=local_delivery_cyrus defer (-1): LMTP connection closed after end of data /var/log/mail.err May 28 08:32:03 mailserver cyrus/master[20202]: process type:SERVICE name:lmtpunix path:/usr/lib/cyrus/bin/lmtpd age:0.563s pid:8650 signaled to death by signal 6 (Aborted) -- System Information: Debian Release: 10.4 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable'), (100, 'testing'), (50, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 4.19.0-8-amd64 (SMP w/12 CPU cores) Kernel taint flags: TAINT_FIRMWARE_WORKAROUND Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8), LANGUAGE=it_IT.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages cyrus-imapd depends on: ii cyrus-common 3.2.0-5~bpo10+1 ii libc6 2.28-10 ii libcom-err2 1.44.5-1+deb10u3 ii libsasl2-2 2.1.27+dfsg-1+deb10u1 ii libssl1.1 1.1.1d-0+deb10u3 ii libwrap0 7.6.q-28 ii zlib1g 1:1.2.11.dfsg-1 Versions of packages cyrus-imapd recommends: ii rsync 3.1.3-6 cyrus-imapd suggests no packages. -- no debconf information