postfix MTA and SSL [duplicate]
My server is running on Ubuntu 14.04 and I have Postfix installed. When I send something to my gmail account, it goes to spam. I set up SPF, DKIM and DMARC, here is a confirmation:
Authentication-Results: mx.google.com;
dkim=pass [email protected];
spf=pass (google.com: domain of [email protected] designates xxx.xxx.xx.xxx as permitted sender) [email protected];
dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=mydomain.com
But there's a red padlock saying: encryption: mydomain.com did not encrypt this message.
Emails from others have such a note: encryption: Standard (TLS)
Could you help me a little with this, what should I do? Might it be a reason that emails from my server go to spam? Thanks in advance.
My /etc/postfix/main.cf:
biff = no
append_dot_mydomain = no
readme_directory = no
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
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 = mail.mydomain.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = mydomain.com, bociuch, localhost.localdomain, localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
milter_protocol = 2
milter_default_action = accept
smtpd_milters = inet:localhost:12301
non_smtpd_milters = inet:localhost:12301
Solution 1:
You are missing the smtp_tls_security_level directive.
smtp_tls_security_level = may
This will set it to opportunistic TLS, using encrypted connections if the server supports it, but allowing unencrypted connections if the server doesn't.
The default value for smtp_tls_security_level is none.