我有一个 postfix/dovecot 服务器。我的客户端通过 imap 使用 MS Outlook 2016 检查电子邮件。一切都很好，直到今天发送/接收停止工作并挂起。
我让客户端清除“发送”文件夹中的所有内容，并订阅/取消订阅文件夹。但没有任何效果。当客户端关闭 Outlook 并重新打开时，我在邮件服务器上看到以下条目：
1465625 Aug 31 16:23:31 email dovecot: imap(wtait)<4374><HUE/RY/nwts2VTBm>: Logged out in=91 out=1012 deleted=0 expunged=0 trashed=0 hdr_count=0 hdr_bytes=0 body_count=0 body_bytes=0
1465626 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Drafts: Mailbox opened because: SELECT
1465627 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox INBOX: Mailbox opened because: SELECT
1465628 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox INBOX: UID 37236: Opened mail because: prefetch
1465629 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox INBOX: UID 37236: Opened mail because: access
1465630 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox INBOX: UID 37236: Opened mail because: full mail
1465631 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Sent: Mailbox opened because: SELECT
1465632 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: Mailbox opened because: SELECT
1465633 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 52: Opened mail because: prefetch
1465634 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 52: Opened mail because: access
1465635 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 52: Opened mail because: full mail
1465636 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 53: Opened mail because: prefetch
1465637 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 53: Opened mail because: access
1465638 Aug 31 16:23:32 email dovecot: imap(wtait)<4372><wc0WRY/nwmlKYboC>: Debug: Mailbox Trash: UID 53: Opened mail because: full mail
1465639 Aug 31 16:23:32 email dovecot: imap-login: Debug: SSL error: read(size=896) failed: Connection reset by peer
客户端可以毫无问题地使用基于 Web 的电子邮件登录。我认为这可能是 MS Outlook 的问题，但不确定如何解决。