Can't get POSTFIX working in virtualmin ubuntu 18

Question

For weeks now I am trying to configure the virtualmin postfix mail server in a vps ubuntu 18 server, to send corporate email messages of the [e-mail] style but I can not receive the messages from gmail, nor connect thunderbird to the server, I attach the postfix main.cf which is where I think the error is, when I send emails from usermin they get to gmail but to the spam folder

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

readme_directory = no

compatibility_level = 2

# TLS parameters
smtpd_tls_cert_file = /etc/postfix/postfix.cert.pem
smtpd_tls_key_file = /etc/postfix/postfix.key.pem
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = vps41250600.local 
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = vps41250600.local, $myhostname, localhost.localdomain, vps.server.local, localhost.server.local, localhost
relayhost = 
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
virtual_alias_maps = hash:/etc/postfix/virtual
sender_bcc_maps = hash:/etc/postfix/bcc
home_mailbox = Maildir/
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination
smtp_tls_security_level = dane
allow_percent_hack = no
smtpd_tls_security_level = may

Answer 1

Compadre hace unos días me vi con este mismo problema. Si tienes un VPS hay formas más sencillas de montar tu propio MTA como Iredmail (te toma 10 minutos) mira aquí

Para detectar problemas en la configuración a parte de revisar los logs en /var/log/mail.log puedes utilizar esta herramienta. Es posible que tengas el correo configurado como un openrelay lo cual hace que google no confíe en ti pero mucho peor puede que te empiecen a indexar en listas negras.

Espero esto te ayude.

In english so everyone can understand me.

Compadre a few days ago I saw myself with this same problem. If you have a VPS there are simpler ways to mount your own MTA like Iredmail (it takes 10 minutes) see here

To detect problems in the configuration apart from checking the logs in /var/log/mail.log you can use this tool. It is possible that you have mail configured as an openrelay which makes google do not trust you but much worse may start to index you in blacklists.

I hope this helps you.

Answer 2

Do you have a firewall preventing connections to your mail server. Port 25 must be available from other's, to test you are a real mail server and to deliver mails to you.