dovecot: lda(info@mydomain) - vacation action: discarding vacation response to mailinglist recipient?

Hello,

I'm trying to set auto reply for my email account, through Roundcube and ManageSieve plugin (the plugin itself and its regular filtering works fine), however the auto-reply doesn't arrive to the sender's inbox, when I tested it with sending an email to myself/my server, from my Gmail account, my maillog has a line, stating;

Jul 18 15:28:06 mailsrv dovecot: lda(info@mywebsite.com)<44812>: sieve: msgid=CA+GnASfyKJDPB-K2uCvxaOL-XQQ7Uv=yJt7sgJSYm-YJzYJSfQ@mail.gmail.com: vacation action: discarding vacation response to mailinglist recipient mysendermail@gmail.com

Any idea would be much appreciated, thank you!