alt1.aspmx.l.google.com.
alt2.aspmx.l.google.com.
alt3.aspmx.l.google.com.
alt4.aspmx.l.google.com.
aspmx.l.google.com.
inbound-smtp.eu-west-1.amazonaws.com.
d17jba7n8vo99n.cloudfront.net.
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uiowa-edu.mail.protection.outlook.com.
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