两周前，我使用Dovecot和Postfixbuild立了一个Mailserver。 这是一个每天大约有5000封邮件的组织的服务器。 一切工作正常，但今天我启用/etc/dovecot/conf.d/10-logging.conf verbose_ssl ，我几乎每个IMAPlogin得到这个错误消息：
Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: elliptic curve secp384r1 will be used for ECDH and ECDHE key exchanges Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: elliptic curve secp384r1 will be used for ECDH and ECDHE key exchanges Aug 30 00:13:32 mail dovecot: auth: Debug: auth client connected (pid=20442) Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x10, ret=1: before/accept initialization [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: before/accept initialization [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2002, ret=-1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2002, ret=-1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2001, ret=1: unknown state [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x20, ret=1: SSL negotiation finished successfully [94.220.159.232] Aug 30 00:13:32 mail dovecot: imap-login: Debug: SSL: where=0x2002, ret=1: SSL negotiation finished successfully [94.220.159.232]
我发现只有一个问题与类似的日志条目的计算器，但答案是包括所有中间的证书，我已经做了。
我的/etc/dovecot/conf.d/10-ssl.conf （注释删除）：
ssl = required ssl_cert = </etc/ssl/certs/my-domain.de ssl_key = </etc/ssl/private/my-domain.de ssl_dh_parameters_length = 2048 ssl_protocols = !SSLv2 !SSLv3 ssl_cipher_list = ALL:!LOW:!SSLv2:!EXP:!aNULL ssl_prefer_server_ciphers = yes
有谁知道，在mail.log中这些unknown state条目究竟是什么意思？
这些不是错误消息，而是debugging消息，并清楚地标记为这些。 除非需要verbose_ssl来debugging问题，否则应该closures它。
更多背景：它正在显示SSL握手时所经历的每个状态。 要显示使用来自OpenSSL的函数SSL_state_string_long的状态描述。 该函数没有每个可能状态的string描述，如果没有更具体的描述，则返回“未知状态”。 再次，没有什么可担心的。