fail2ban测试发送电子邮件

Question

我正在尝试使用fail2ban测试电子邮件的发送，显然mta = mail应该可以解决问题，并且我还尝试了mail操作。但是我不确定如何测试它是否有效。从我读到的内容中，action_mwl在启动和停止时发送电子邮件，但事实并非如此。您能否让我知道如何测试。 谢谢

[default]
bantime  = 600
findtime = 300
banaction = ufw
banaction_allports = iptables-allports
destemail = XXXXXX@gmail.com
sendername = Fail2ban
mta = mail
action = %(action_mwl)s
         mail[name=ssh, dest=XXXXXX@gmail.com]


[sshd]
enabled = true
port = XXXXXX
filter = sshd
logpath = /var/log/auth.log
maxretry = 3

[postfix-sasl]
enabled  = true
findtime  = 10800
bantime = 7200
port     = smtp,465,587 submission,imap2,imap3,imaps,pop3,pop3s
filter   = postfix[mode=auth]
logpath  = /var/log/fail2ban-postfix.log
backend  = %(postfix_backend)s
maxretry = 2