用Postfix 3.1.4运行Debian 9。
发送附件大于默认值（10MB）的电子邮件到此服务器上的帐户时，发件人正在收到：552请求的邮件操作中止：已超出存储分配
我目前的运行configuration：
# postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases append_dot_mydomain = no biff = no compatibility_level = 2 inet_interfaces = all inet_protocols = all mailbox_size_limit = 0 message_size_limit = 35720000 mydestination = localhost myhostname = mail.example.net mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 myorigin = /etc/mailname readme_directory = no recipient_delimiter = + relayhost = smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_type = dovecot smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/letsencrypt/live/mail.example.net/fullchain.pem smtpd_tls_key_file = /etc/letsencrypt/live/mail.example.net/privkey.pem smtpd_use_tls = yes virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf virtual_mailbox_limit = ${message_size_limit}0 virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf virtual_transport = lmtp:unix:private/dovecot-lmtp 有任何想法吗？
日志：
Jul 19 11:05:18 mail3 postfix/smtpd[2231]: connection established Jul 19 11:05:18 mail3 postfix/smtpd[2231]: master_notify: status 0 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: name_mask: resource Jul 19 11:05:18 mail3 postfix/smtpd[2231]: name_mask: software Jul 19 11:05:18 mail3 postfix/smtpd[2222]: rewrite stream disconnect Jul 19 11:05:18 mail3 postfix/smtpd[2231]: connect from mail-wm0-f48.google.com[74.125.82.48] Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: mail-wm0-f48.google.com: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: 74.125.82.48: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: mail-wm0-f48.google.com: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: 74.125.82.48: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: smtp_stream_setup: maxtime=300 enable_deadline=0 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? 127.0.0.0/8 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? 127.0.0.0/8 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? [::ffff:127.0.0.0]/104 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? [::ffff:127.0.0.0]/104 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? [::1]/128 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? [::1]/128 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: mail-wm0-f48.google.com: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: 74.125.82.48: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: send attr request = connect Jul 19 11:05:18 mail3 postfix/smtpd[2231]: send attr ident = smtp:74.125.82.48 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: status Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: status Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute value: 0 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: count Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: count Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute value: 1 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: rate Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: rate Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute value: 1 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: (list terminator) Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: (end) Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 220 mail.example.net ESMTP Postfix (Debian/GNU) Jul 19 11:05:18 mail3 postfix/smtpd[2231]: < mail-wm0-f48.google.com[74.125.82.48]: EHLO mail-wm0-f48.google.com Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: mail-wm0-f48.google.com: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: 74.125.82.48: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-mail.example.net Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-PIPELINING Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-SIZE 35720000 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-VRFY Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-ETRN Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-STARTTLS Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-ENHANCEDSTATUSCODES Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-8BITMIME Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250-DSN Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 250 SMTPUTF8 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: < mail-wm0-f48.google.com[74.125.82.48]: QUIT Jul 19 11:05:18 mail3 postfix/smtpd[2231]: > mail-wm0-f48.google.com[74.125.82.48]: 221 2.0.0 Bye Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? 127.0.0.0/8 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? 127.0.0.0/8 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? [::ffff:127.0.0.0]/104 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? [::ffff:127.0.0.0]/104 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostname: smtpd_client_event_limit_exceptions: mail-wm0-f48.google.com ~? [::1]/128 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_hostaddr: smtpd_client_event_limit_exceptions: 74.125.82.48 ~? [::1]/128 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: mail-wm0-f48.google.com: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: match_list_match: 74.125.82.48: no match Jul 19 11:05:18 mail3 postfix/smtpd[2231]: send attr request = disconnect Jul 19 11:05:18 mail3 postfix/smtpd[2231]: send attr ident = smtp:74.125.82.48 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: status Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: status Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute value: 0 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: private/anvil: wanted attribute: (list terminator) Jul 19 11:05:18 mail3 postfix/smtpd[2231]: input attribute name: (end) Jul 19 11:05:18 mail3 postfix/smtpd[2231]: disconnect from mail-wm0-f48.google.com[74.125.82.48] ehlo=1 quit=1 commands=2 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: master_notify: status 1 Jul 19 11:05:18 mail3 postfix/smtpd[2231]: connection closed
解决了。 有一个智能防火墙阻止大于configuration的附件。