inbound-smtp.us-east-1.amazonaws.com.
alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
aspmx2.googlemail.com.
aspmx3.googlemail.com.
aspmx.l.google.com.
d3mma439gn5i1e.cloudfront.net.
2600:9000:2200:6c00:b:267c:6480:93a1
2600:9000:2200:9400:b:267c:6480:93a1
2600:9000:2200:1200:b:267c:6480:93a1
2600:9000:2200:3200:b:267c:6480:93a1
2600:9000:2200:da00:b:267c:6480:93a1
2600:9000:2200:e00:b:267c:6480:93a1
2600:9000:2200:6a00:b:267c:6480:93a1
2600:9000:2200:c000:b:267c:6480:93a1
2600:9000:2157:2800:16:5c7f:f7c0:93a1
2600:9000:2157:4a00:16:5c7f:f7c0:93a1
2600:9000:2157:8400:16:5c7f:f7c0:93a1
2600:9000:2157:9e00:16:5c7f:f7c0:93a1
2600:9000:2157:a00:16:5c7f:f7c0:93a1
2600:9000:2157:c00:16:5c7f:f7c0:93a1
2600:9000:2157:e000:16:5c7f:f7c0:93a1
2600:9000:2157:e400:16:5c7f:f7c0:93a1
alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
alt3.aspmx.l.google.com.
alt4.aspmx.l.google.com.
aspmx.l.google.com.
mx1.titan.email.
mx2.titan.email.
k23-dev.mail.protection.outlook.com.