groups.google.com.

groups.l.google.com.

173.194.208.138
ql-in-f138.1e100.net
173.194.208.100
ql-in-f100.1e100.net
173.194.208.101
yudfwnl-in-f101.1e100.net
173.194.208.102
ql-in-f102.1e100.net
173.194.208.113
ql-in-f113.1e100.net
173.194.208.139
yudfwnl-in-f139.1e100.net

groups.google.com.
groups.l.google.com.
2607:f8b0:400d:c07::71
2607:f8b0:400d:c07::65
2607:f8b0:400d:c07::64
2607:f8b0:400d:c07::8b

alt1.gmr-smtp-in.l.google.com.
alt2.gmr-smtp-in.l.google.com.
alt3.gmr-smtp-in.l.google.com.
alt4.gmr-smtp-in.l.google.com.
gmr-smtp-in.l.google.com.
groups.google.com.
groups.l.google.com.