Suspicious stuff on FROM option in a sub-account.

[#1]

One of my sub-accounts is (I'll call it) xxxx_xxxx@verizon.net.  I signed in to this account to send a message. In the FROM field, on the right, I clicked on the box with the DOWN arrow to see what else might be listed there.    That revealed a drop-down box with 2 choices for SENDER NAME: xxxx_xxxx@verizon.net. or yyyy_yyyy@ verizon.netI have no idea who yyyy_yyyy is.  It is not me or one of my sub-accounts. I am the only person who uses this computer.What is going on???

Is this something to be concerned about?  Seems to me that yyyy_yyyy would not be able to log in to my xxxx_xxxx account, since yyyy_yyyy does not know the username or password.  But what's going on here?

[#2]

There should be an e-mail address that you created and a vzid e-mail address that verizon assigned to your account

[#3]

Yes, I know about the VZID address.  The other email address that comes up on this account is not a VZID address--it is a name, or word, that was obviously created by someone, but not me.

[#4]

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@MrCurious2 wrote:

Yes, I know about the VZID address.  The other email address that comes up on this account is not a VZID address--it is a name, or word, that was obviously created by someone, but not me.

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See if shows up as a sub account on your admin pages, and if so delete.

[#5]

But what does it mean that this sub-account, totally unfamiliar to me, is there? How could it have gotten there?

[#6]

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@MrCurious2 wrote:
But what does it mean that this sub-account, totally unfamiliar to me, is there? How could it have gotten there?

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At a guess, it means someone accessed your account and created an alias. Change your password and secret question/answer.

[#7]

what is the purpose of a sub account