12:08:47.361200 IP 192.168.20.2.57980 > google-public-dns-a.google.com.domain: 36870+ A? mail. (22)
12:08:47.376098 IP google-public-dns-a.google.com.domain > 192.168.20.2.57980: 36870 NXDomain 0/1/0 (97)
12:09:23.158959 IP 192.168.20.2.54077 > google-public-dns-a.google.com.domain: 43686+ A? mail. (22)
12:09:23.173561 IP google-public-dns-a.google.com.domain > 192.168.20.2.54077: 43686 NXDomain 0/1/0 (97)
12:09:57.213778 IP 192.168.20.2.39930 > google-public-dns-a.google.com.domain: 59598+ A? mail. (22)
12:09:57.228690 IP google-public-dns-a.google.com.domain > 192.168.20.2.39930: 59598 NXDomain 0/1/0 (97)