在我的 Rsys 日志中，我收到了不是由我的服务器发起的奇怪电子邮件请求：
Nov 17 09:32:18 localhost postfix/qmgr[21748]: 8E52272C09: from=<>, size=33770, nrcpt=1 (queue active)
Nov 17 09:32:18 localhost postfix/qmgr[21748]: 15E6472BE2: from=<>, size=36706, nrcpt=1 (queue active)
Nov 17 09:32:18 localhost postfix/qmgr[21748]: AB7F672BE6: from=<>, size=36159, nrcpt=1 (queue active)
Nov 17 09:32:18 localhost postfix/qmgr[21748]: 723D672C0A: from=<>, size=33263, nrcpt=1 (queue active)
Nov 17 09:32:20 localhost postfix/smtp[27598]: 8E52272C09: to=<yuliy.kirillov@narad.crimea.com>, relay=mail.crimea.com[80.245.112.5]:25, delay=6902, delays=6900/0.02/2.3/0, dsn=4.7.1, status=deferred (host mail.crimea.com[80.245.112.5] refused to talk to me: 554 5.7.1 Service unavailable; Client host blocked using b.barracudacentral.org)
Nov 17 09:32:48 localhost postfix/smtp[27600]: …