chengyu0701988的部落格

沒想到Google Cloud 竟然內建 不開放 發信port

詢問經銷商得知 發信只能用兩種方式 一種APP 一種RELAY Sendgrid

這次選用第二種作測試，請先行去 https://sendgrid.com/  申請帳號密碼，等等在relay時會需要此組帳密作為登入

1.首先 先移除掉預設的sendmail 安裝 postfix

/etc/init.d/sendmail stop      #停止sendmail

yum -y install postfix           #安裝 要用的postfix

rpm -e sendmail                  #移除掉sendmail

service postfix start             #出發吧 postfix

# cat > /etc/postfix/sasl_passwd << EOF

[smtp.sendgrid.net]:2525 YOUR_SENDGRID_USERNAME:YOUR_SENDGRID_PASSWORD
EOF

# postmap /etc/postfix/sasl_passwd
# ls -l /etc/postfix/sasl_passwd*
-rw------- 1 root root 68 Aug 1 09:50 /etc/postfix/sasl_passwd
-rw------- 1 root root 12288 Aug 1 09:51 /etc/postfix/sasl_passwd.db

# cat >> /etc/postfix/main.cf << EOF
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options = noanonymous
smtp_tls_security_level = encrypt
header_size_limit = 4096000
relayhost = [smtp.sendgrid.net]:2525
EOF

# yum install cyrus-sasl-plain
# postfix reload
postfix/postfix-script: refreshing the Postfix mail system

# echo test | mail -s test xxx@gmail.com
# tail -n 5 /var/log/maillog

順帶一提

如果是要用php 來發信的，裝了postfix，請記得去php.ini

修改 

sendmail_path = /usr/sbin/sendmail.postfix -t -i