Bug#1080434: exim4-base: exim4 starts before home directories are mounted

[Peter Chubb]

Package: exim4-base
Version: 4.98-1
Severity: normal

Dear Maintainer,

After a recent apt update and reboot, exim4 started and grabbed a
reference to /home before autofs started making home directories
available.  This meant it could not deliver email.

Autofs map for /home looks like:
* nfs-server:/export/home/&


exim4 needs to look for ~/.forward when delivering email; (and we often end up
delivering into ~/Mail/inbox for each user)


I think exim4's systemd unit file needs something like
After= ... remote-fs.target autofs.service
RequireMountsFor=/home/someuser

to make sure that home directories are available by the time it starts (but
systemd is a bit of a mystery to me)

Package-specific info:
Exim version 4.98 #2 built 11-Jul-2024 05:41:31
Copyright (c) University of Cambridge, 1995 - 2018
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2024
Hints DB:
 Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
Support for: Content_Scanning crypteq Expand_dlfunc iconv() IPv6 PAM Perl GnuTLS move_frozen_messages TLS_resume DANE DKIM DNSSEC ESMTP_Limits ESMTP_Wellknown Event I18N OCSP PIPECONNECT PRDR PROXY Queue_Ramp SOCKS SPF SRS TCP_Fast_Open
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmjz dbmnz dnsdb dsearch ldap ldapdn ldapm mysql nis nis0 passwd pgsql sqlite
Authenticators: cram_md5 cyrus_sasl dovecot external plaintext spa tls
Routers: accept dnslookup ipliteral iplookup manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore/mbx autoreply lmtp pipe smtp
Malware: f-protd f-prot6d drweb fsecure sophie clamd avast sock cmdline
Fixed never_users: 0
Configure owner: 0:0
Size of off_t: 8
Configuration file search path is /etc/exim4/exim4.conf:/var/lib/exim4/config.autogenerated
Configuration file is /var/lib/exim4/config.autogenerated

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.7.12-amd64 (SMP w/4 CPU threads; PREEMPT)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages exim4-base depends on:
ii  adduser                        3.137
ii  cron [cron-daemon]             3.0pl1-189
ii  debconf [debconf-2.0]          1.5.87
ii  exim4-config [exim4-config-2]  4.98-1
ii  libc6                          2.40-2
ii  libdb5.3t64                    5.3.28+dfsg2-7
ii  libfile-fcntllock-perl         0.22-4+b3
ii  netbase                        6.4
ii  perl                           5.38.2-5
ii  systemd-sysv                   256.5-2

Versions of packages exim4-base recommends:
pn  bsd-mailx | mailx  <none>
ii  psmisc             23.7-1

Versions of packages exim4-base suggests:
pn  exim4-doc-html | exim4-doc-info  <none>
pn  eximon4                          <none>
ii  file                             1:5.45-3
pn  mail-reader                      <none>
ii  openssl                          3.3.1-7
pn  spf-tools-perl                   <none>
pn  swaks                            <none>

-- debconf information:
  exim4/purge_spool: false
  exim4-base/drec: