POSTFIX 不只向 1and1 main 发送电子邮件

Question

我已经在我的 1and1 VPS 上安装了带有 POSTFIX 的 ubuntu 14.04，我无法将电子邮件发送到我自己的电子邮箱。

当我发送电子邮件至：

outlook.com 收到
yahoo.com 收到
Gmail.com 收到
example.co.uk（一对一邮件）未收到

main.cf

# 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

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

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

# 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 = example.co.uk
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = localhost
relayhost = 
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_command = 
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
myorigin = /etc/mailname
inet_protocols = all

Answer 1

当我通过 mailq 命令检查我的邮件队列时出现错误：(delivery temporarily suspended: host mx01.1and1.co.uk[xxx.xx.xxx.xx] refused to talk to me: 554-kundenserver.de (mxeue105) Nemesis ESMTP Service not available 554-No SMTP service 554 invalid DNS PTR resource record, IP=xxx.xxx.xxx.xxx 所以我添加了一个 PTR（反向 DNS）条目。

现在开始工作了:)

POSTFIX 不只向 1and1 main 发送电子邮件

POSTFIX not sending email to 1and1 main only

postfix-mta

vps

ubuntu-14.04