A domain owned by Marchex is currently being used in a phishing scam that attempts to convince unsuspected recipients of an email that it originates from Western Union.
The email lists “onlineupdate.com” in the headers which appear to be faked.
The return address is listed as “Western Union <security@onlineupdate.com>” and the email itself asks the recipient to click on a link that takes them to the domain Santuengiu.net
As a reminder, when you receive emails asking you to log in to your account with any provider or service, always do so by typing in the trusted URL in your browser!