I use the mail server plugin with the roundcube platform, this is the second time the Mail Server using SMTP Relay has been attacked, last month last.
I'll tell you a little, suddenly the e-mail was sent randomly like an embedded bot, I tried changing the SMTP password, but when we activated the postfix/smtp service, the e-mail was immediately sent randomly.
And it happened again today.
Can you help? and is there a fee? Thank You