Postfix：收件人地址被拒绝：无效的HELO / EHLO; 必须是FQDN或地址字面值

发送电子邮件时，收到未送达的邮件，其中包含以下消息：“ 收件人地址被拒绝：无效的HELO / EHLO;必须是FQDN或地址字面值，而不是来自某些Web服务器的”xxx“554 5.7.1 ”我的VPS）。

我检查了日志，但没有发现任何可疑的东西。

后缀configuration如下（应该是相当默认的）：

# 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 $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = /usr/share/doc/postfix # TLS parameters smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = vm19243 alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases myorigin = /etc/mailname mydestination = vm19243, localhost, localhost.localdomain relayhost = mynetworks = 127.0.0.0/8 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all html_directory = /usr/share/doc/postfix/html virtual_alias_domains = virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /var/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 inet_protocols = all smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf smtpd_tls_security_level = may transport_maps = hash:/var/lib/mailman/data/transport-mailman, proxy:mysql:/etc/postfix/mysql-virtual_transports.cf relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipi$ smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf 

我试着玩不同的“ smtpd_relay_restrictions ”设置，但无济于事。

• 内部用户收到数千个NDR邮件
• 电子邮件退回pipe理
• Ubuntu Linux – Postfix拒绝所有来自非本地主机的邮件
• 频繁拒绝电子邮件：554 – MTA的声誉不佳
• 我应该更改信封从Sendmail

我也检查了垃圾邮件黑名单，但IP似乎没有列入黑名单（根据mxtoolbox.com）。

我欢迎任何build议！

运行Debian 8.6，后缀版本2.11.3