Zertifikatproblem

[Frank Kirschner]

> Hallo!
>
> Ich habe einen neuen Mailserver mit Postfix + Dovecot aufgesetzt
> (CentOS 8).
> Die Konfiguration habe ich von meinem alten Server (CentOS 6) übernommen.
>
> Jetzt verbindet sich meine Android-App (K-9 Mail) nicht mehr per IMAP.
> Thunderbird funktioniert.
>
> Wo ist der Fehler?
>
>
>
> [root at localhost ~]# dovecot --version
> 2.3.8 (9df20d2db)
>
> [root at localhost ~]# doveconf -n
> # 2.3.8 (9df20d2db): /etc/dovecot/dovecot.conf
> # Pigeonhole version 0.5.8 (b7b03ba2)
> # OS: Linux 4.18.0-193.6.3.el8_2.x86_64 x86_64 CentOS Linux release
> 8.2.2004 (Core)
> # Hostname: localhost
> auth_debug = yes
> auth_debug_passwords = yes
> auth_mechanisms = cram-md5 plain login
> auth_verbose = yes
> auth_verbose_passwords = sha1
> first_valid_uid = 1000
> mail_debug = yes
> mail_location = maildir:~/Maildir
> 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
> environment mailbox date index ihave duplicate mime foreverypart
> extracttext
> mbox_write_locks = fcntl
> namespace inbox {
>    inbox = yes
>    location =
>    mailbox Drafts {
>      special_use = \Drafts
>    }
>    mailbox Junk {
>      special_use = \Junk
>    }
>    mailbox Sent {
>      special_use = \Sent
>    }
>    mailbox "Sent Messages" {
>      special_use = \Sent
>    }
>    mailbox Trash {
>      special_use = \Trash
>    }
>    prefix =
> }
> passdb {
>    driver = pam
> }
> passdb {
>    args = scheme=CRYPT username_format=%u /etc/dovecot/users
>    driver = passwd-file
> }
> plugin {
>    sieve = ~/.dovecot.sieve
>    sieve_dir = ~/sieve
>    sieve_global_dir = /etc/dovecot/sieve/global/
>    sieve_global_path = /etc/dovecot/sieve/default.sieve
> }
> protocols = imap sieve lmtp sieve
> service auth {
>    unix_listener /var/spool/postfix/private/auth {
>      group = postfix
>      mode = 0666
>      user = postfix
>    }
> }
> service lmtp {
>    unix_listener /var/spool/postfix/private/dovecot-lmtp {
>      group = postfix
>      mode = 0600
>      user = postfix
>    }
> }
> service managesieve-login {
>    inet_listener sieve {
>      port = 4190
>    }
> }
> ssl_cert = </etc/pki/tls/certs/certificate.cer
> ssl_key = # hidden, use -P to show it
> userdb {
>    driver = passwd
> }
> userdb {
>    args = username_format=%u /etc/dovecot/users
>    driver = passwd-file
> }
> verbose_ssl = yes
> protocol lmtp {
>    auth_username_format = %n
>    mail_plugins = " quota sieve"
>    postmaster_address = postmaster at xxx.de
> }
> protocol sieve {
>    managesieve_max_line_length = 65536
> }
>
Was steht denn im Logfile vom Dovecot wenn ein Verbindungsversuch erfolgt?

lg Frank