Mailbox connection fails: Connection closed (No commands sent) Help please

7 Dec 2021


      I would greatly appreciate help with this.
VPS ubuntu 20.04 postfix  3.4.13 dovecot 2.3.7.2
I'm trying to set up postfix with dovecot for virtual mailboxes using mysql
I have a database mailserver with tables virtual_domains, virtual_users &
virtual_aliases
Using postmap I've tested all connections and gotten correct responses (1,
1, smoker1@sizzelicks.com mailto:smoker1@sizzelicks.com )
I have a domain: sizzelicks.com and an email address smoker1@sizzelicks.com
mailto:smoker1@sizzelicks.com
The password for the user is encrypted with sha512-CRYPT
My VPS IP is: 194.163.45.150
MX test from:
https://mxtoolbox.com/SuperTool.aspx?action=mx%3asizzelicks.com&run=toolpage
I set up a mailbox for smoker1@sizzelicks.com
mailto:smoker1@sizzelicks.com  in Thunderbird:
IMAP and SMTP server: mail.sizzelicks.com
IMAP port: 993 SMTP port: 587
IMAP connection security: SSL/TLS
SMTP connection security: STARTTLS
When I try to connect to the mailbox Thunderbird returns this:
server mail.sizzelicks.com has disconnected.
The server may have gone down or there may be a network problem.
mail.log
Dec 7 21:16:02 softlinksys dovecot: imap-login: Login: user=, method=PLAIN,
rip=67.8.3.170, lip=194.163.45.150, mpid=63115, TLS, session=
Dec 7 21:16:02 softlinksys dovecot: imap(smoker1@sizzelicks.com)<63115>:
Connection closed (No commands sent) in=0 out=388 deleted=0 expunged=0
trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
Dec 7 21:16:04 softlinksys dovecot: imap-login: Login: user=, method=PLAIN,
rip=67.8.3.170, lip=194.163.45.150, mpid=63117, TLS, session=
Dec 7 21:16:04 softlinksys dovecot: imap(smoker1@sizzelicks.com)<63117>:
Connection closed (No commands sent) in=0 out=388 deleted=0 expunged=0
trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
Dovecot -n
# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 ()
# OS: Linux 5.4.0 x86_64 Ubuntu 20.04.3 LTS ext4
# Hostname: softlinksys.com
auth_mechanisms = plain login
mail_location = maildir:/var/mail/vhosts/%d/%n
mail_privileged_group = mail
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 = /etc/dovecot/dovecot-sql.conf.ext
driver = sql
}
postmaster_address = postmaster at aecperformance.com
protocols = imap pop3 lmtp
service auth-worker {
user = vmail
}
service auth {
unix_listener /var/spool/postfix/private/auth {
group = postfix

mode = 0666

user = postfix
}
unix_listener auth-userdb {
mode = 0600

user = vmail
}
user = dovecot
}
service imap-login {
inet_listener imap {
port = 0
}
inet_listener imaps {
port = 993

ssl = yes
}
}
service lmtp {
unix_listener /var/spool/postfix/private/dovecot-lmtp {
group = postfix

mode = 0600

user = postfix
}
}
service pop3-login {
inet_listener pop3 {
port = 0
}
inet_listener pop3s {
port = 995

ssl = yes
}
}
ssl = required
ssl_cert = 
ssl_client_ca_dir = /etc/ssl/certs
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
userdb {
driver = passwd
}
userdb {
args = uid=vmail gid=vmail home=/var/mail/vhosts/%d/%n
driver = static
}
Kristy Atkins
ViviData SaaS

postfix＠aecperformance.com

Alexander Dalloz

Robert L Mathews

postfix＠aecperformance.com

Joseph Tam

postfix＠aecperformance.com

Aki Tuomi

Alexander Dalloz

# openssl s_client -connect 194.163.45.150:993 CONNECTED(00000003) Can't use SSL_get_servername depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1 verify return:1 depth=1 C = US, O = Let's Encrypt, CN = R3 verify return:1 depth=0 CN = aecperformance.com verify return:1

postfix＠aecperformance.com

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