raspberry pi(gmail 経由でのリレー送信方法)

■以下の手順で行ってみる。

# vi /etc/postfix/sasl_passwd

———————sasl_passwd—————————————————————————————

[smtp.gmail.com]:587 xxxxxxx@gmail.com:password

——————————————————————————————————————————————-

# vi main.cf

———————————main.cf——————————————————————————————----------------------------------------------

# Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

readme_directory = no

# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on

# fresh installs.

compatibility_level = 2

# 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

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for

# information on enabling SSL in the smtp client.

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination

myhostname = raspberrypi

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

mydestination = $myhostname, raspberrypi, localhost.localdomain, , localhost

#relayhost =

mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128

mailbox_size_limit = 0

recipient_delimiter = +

inet_interfaces = all

inet_protocols = all

# Posifix Configuratoins

relayhost = smtp.gmail.com:587

# SASL Authentication

smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd

smtp_sasl_auth_enable = yes

smtp_sasl_security_options = noanonymous

smtp_sasl_mechanism_filter = plain

# TLS Settings

smtp_use_tls = yes

smtp_tls_security_level = encrypt

tls_random_source = dev:/dev/urandom

—————————————————————————————————————————————————-----------------------------------------------

■sasl_passwdを設定する

sudo chmod 400 /etc/postfix/sasl_passwd

sudo postmap /etc/postfix/sasl_passwd

■smtp.gmail.comのルート認証局（Root CA）をダウンロードして配置する

wget https://www.thawte.com/roots/thawte_Premium_Server_CA.pem

■Gmail アカウントへのアクセスとセキュリティ設定の管理のページに行く。 

->接続済みのアプリとサイト - 安全性の低いアプリの許可: 有効にする。