Dovecot IMAP and SMTP suddenly not available - email

Question

Hello Community and first things First:
dovecot --version
2.2.9
dovecot -n
# 2.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 3.13.0-042stab125.5 x86_64 Ubuntu 14.04.5 LTS
auth_mechanisms = plain login
dict {
sqlquota = mysql:/etc/dovecot/dovecot-dict-sql.conf
}
listen = *,[::]
log_timestamp = "%Y-%m-%d %H:%M:%S "
login_log_format_elements = user=<%u> method=%m rip=%r lip=%l mpid=%e %c %k
mail_fsync = always
mail_home = /var/vmail/%d/%n
mail_location = maildir:~/
mail_nfs_index = yes
mail_nfs_storage = yes
mail_plugins = quota acl
vmanagesieve_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 ihave
mmap_disable = yes
namespace {
list = yes
location = maildir:%%h/:INDEXPVT=~/Shared/%%u
prefix = Shared/%%u/
separator = /
subscriptions = yes
type = shared
}
namespace inbox {
inbox = yes
location =
mailbox Archiv {
special_use = \Archive
}
mailbox Archive {
auto = subscribe
special_use = \Archive
}
mailbox Archives {
special_use = \Archive
}
mailbox "Deleted Messages" {
special_use = \Trash
}
mailbox Drafts {
auto = subscribe
special_use = \Drafts
}
mailbox Entwürfe {
special_use = \Drafts
}
mailbox "Gelöschte Objekte" {
special_use = \Trash
}
mailbox Gesendet {
special_use = \Sent
}
mailbox Junk {
auto = subscribe
special_use = \Junk
}
mailbox Papierkorb {
special_use = \Trash
}
mailbox Sent {
auto = subscribe
special_use = \Sent
}
mailbox "Sent Messages" {
special_use = \Sent
}
mailbox Trash {
auto = subscribe
special_use = \Trash
}
prefix =
separator = /
}
passdb {
args = /etc/dovecot/dovecot-mysql.conf
driver = sql
}
plugin {
acl = vfile
acl_anyone = allow
acl_shared_dict = file:/var/vmail/shared-mailboxes.db
quota = dict:User quota::proxy::sqlquota
quota_rule2 = Trash:storage=+100%%
sieve = /var/vmail/sieve/%u.sieve
sieve_after = /var/vmail/sieve/global.sieve
sieve_max_script_size = 1M
sieve_quota_max_scripts = 0
sieve_quota_max_storage = 0
}
protocols = imap sieve lmtp pop3
service auth {
unix_listener /var/spool/postfix/private/auth_dovecot {
group = postfix
mode = 0660
user = postfix
}
unix_listener auth-master {
mode = 0600
user = vmail
}
unix_listener auth-userdb {
mode = 0600
user = vmail
}
user = root
}
service dict {
unix_listener dict {
group = vmail
mode = 0660
user = vmail
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix
mode = 0600
user = postfix
}
user = vmail
}
service managesieve-login {
inet_listener sieve {
port = 4190
}
process_min_avail = 2
service_count = 1
vsz_limit = 128 M
}
service managesieve {
process_limit = 256
}
ssl_cert = </etc/ssl/mail/mail.crt
ssl_cipher_list = EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA384:EECDH+aRSA+SHA256:EECD H:+CAMELLIA256:+AES256:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5 :!EXP:!PSK:!DSS:!RC4:!SEED:!ECDSA:CAMELLIA256-SHA:AES256-SHA:CAMELLIA128- SHA:AES128-SHA
ssl_dh_parameters_length = 2048
ssl_key = </etc/ssl/mail/mail.key
ssl_protocols = !SSLv3 !SSLv2
userdb {
args = /etc/dovecot/dovecot-mysql.conf
driver = sql
}
protocol imap {
mail_plugins = quota imap_quota imap_acl acl
}
protocol lmtp {
auth_socket_path = /var/run/dovecot/auth-master
mail_plugins = quota sieve acl
postmaster_address = postmaster#domain1.com
}
protocol sieve {
managesieve_logout_format = bytes=%i/%o
}
remote 127.0.0.1 {
disable_plaintext_auth = no
}
Mail.err
Nov 13 23:59:06 webdev dovecot: auth: Error: PLAIN(account#domain2.com, XXX.XXX.XXX.XXX,<y869CoDETEST4dHk>): Request 29154.1 timed out after 150 secs, state=1
Mail.log
Nov 13 23:27:54 webdev dovecot: auth: Error: LOGIN(account#domain1.com,IP.IP.IP.IP,<oN4ly+TestDZ6dHk>): Request 28118.1 timed out after 150 secs, state=1
Nov 13 23:27:57 webdev dovecot: auth: Error: PLAIN( account#domain2.com,XXX.XXX.XXX.XXX,<FAxKe+JaatES7tHk>): Request 28120.1 timed out after 150 secs, state=1
Nov 13 23:28:24 webdev dovecot: imap-login: Disconnected: Inactivity during authentication (disconnected while authenticating, waited 180 secs): user=<>, method=LOGIN, rip=ClientIP, lip=ServerIP, TLS: Disconnected, TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)
[...]
Nov 13 23:47:15 webdev dovecot: imap-login: Aborted login (no auth attempts in 0 secs): user=<>, rip=84.119.151.17, lip=62.75.185.32
I did not change anything on my client nor serverside setup and i suddenly could not reach the Mailserver anymore. Obviously I can reach the Server using SSH or HTTP.
I hope I provided all infos you need to help me in this situation. And am grateful for every hint to solve this as I dont even have a clue what to look for.

Answer 1

The error messages are talking about a timeout on the authentication, and the config shows that the authentication is using a MySQL database. For this reason I would check if the MySQL process is still up, or restart the service (if it's running as a service, which is probably the case).