邮箱申请需要域名

# 编辑Postfix配置文件
sudo nano /etc/postfix/main.cf

# 添加或修改以下配置
myhostname = mail.example.com
mydomain = example.com
myorigin = $mydomain
inet_interfaces = all
inet_protocols = ipv4
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
relayhost =
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
append_dot_mydomain = no
readme_directory = no
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_security_level=may
smtpd_tls_protocols = !SSLv2, !SSLv3, TLSv1, TLSv1.1, TLSv1.2
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = localhost, localhost.localdomain, , example.com
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
home_mailbox = Maildir/
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_tls_auth_only = no
smtpd_client_restrictions = permit_sasl_authenticated
smtpd_helo_restrictions = permit_mynetworks, warn_if_reject reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, permit
smtpd_sender_restrictions = permit_sasl_authenticated
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_end_of_data_restrictions = check_policy_service inet:127.0.0.1:10023
smtp_tls_security_level = encrypt
smtp_use_tls = yes
smtpd_tls_security_level = may
smtpd_tls_protocols = !SSLv2, !SSLv3, TLSv1, TLSv1.1, TLSv1.2
smtpd_tls_ciphers = high
smtpd_tls_eecdh_grade = strong
tls_preempt_cipherlist = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_fingerprint_digest = sha256
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtpd_tls_cert_chain_files = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_dh1024_param_file = /etc/postfix/dh2048.pem
smtpd_tls_dh512_param_file = /etc/postfix/dh512.pem
smtpd_tls_eecdh_rsa_keyfile = /etc/postfix/tls-eecdh-rsa.pem
smtpd_tls_eecdh_ecdsa_keyfile = /etc/postfix/tls-eecdh-ecdsa.pem
smtpd_tls_eecdh_curve = prime256v1
smtpd_tls_eecdh_rsa_curve = prime256v1
smtpd_tls_eecdh_ecdsa_curve = prime256v1
smtpd_tls_session_tickets = yes
smtpd_tls_session_ticket_key_file = /etc/postfix/tls-session-ticket.key
smtpd_tls_session_ticket_lifetime = 3600s
smtpd_tls_compression = zlib
smtpd_tls_min_ciphers = medium
smtpd_tls_max_ciphers = high
smtpd_tls_cipher_list = high:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4
smtpd_tls_mandatory_ciphers = high
smtpd_tls_mandatory_protocols = TLSv1.2
smtpd_tls_advanced_protection_enable = yes
smtpd_tls_dos_protection_enable = yes
smtpd_tls_false_start_enable = yes
smtpd_tls_defer_hello_enable = yes
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
smtpd_tls_cert_chain_files = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_dh1024_param_file = /etc/postfix/dh2048.pem
smtpd_tls_dh512_param_file = /etc/postfix/dh512.pem
smtpd_tls_eecdh_rsa_keyfile = /etc/postfix/tls-eecdh-rsa.pem
smtpd_tls_eecdh_ecdsa_keyfile = /etc/postfix/tls-eecdh-ecdsa.pem
smtpd_tls_eecdh_curve = prime256v1
smtp, smtpd_tls_eecdh_rsa_curve = prime256v1
smtpd_tls_eecdh_ecdsa_curve = prime256v1
smtpd_tls_session_tickets = yes
smtpd_tls_session_ticket_key_file = /etc/postfix/tls-session-ticket.key
smtpd_tls_session_ticket_lifetime = 3600s
smtpd_tls_compression = zlib
smtpd_tls_min_ciphers = medium
smtpd_tls_max_ciphers = high
smtpd_tls_cipher_list = high:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4
smtpd_tls_mandatory_ciphers = high
smtpd_tls_mandatory_protocols = TLSv1.2
smtpd_tls_advanced_protection_enable = yes
smtpd_tls_dos_protection_enable = yes
smtpd_tls_false_start_enable = yes
smtpd_tls_defer_hello_enable = yes