How do I know if subscribers are real?

[Angela]

I have had very few email subscribers to my blog, but in the past week or so, I've had a rapid increase in the number of subscribers.  Normally, that would be good news, but these email addresses all look kind of suspect.  They are pretty similar, some sort of name and other various letters @outlook.com.  Should I be concerned?

[Antonio Ja Batalha]

Angela muitas vezes é publicidade, mas bem pode bloquear ou deixar de ser assinante. Se tivesse mandado alguns seria mais fácil responder. Tudo de bom.

[C. Osvaldo Gomez]

I'm having the same problem!  Frustrating.  Never ends.

[Sue Vine]

I am having the same, started mid June

[M. J. Veritas]

I'm experiencing this exact problem on my blog. All bogus subscribers have @outlock.com as you indicate. Frustrating!

[Lindsay at Lindsay'sSweetWorld]

The exact same thing has been happening to me on my blog.  I am getting hundreds of new subscribers each week and they all end in @outlook.com just as yours do.  The craziest part is that the status for all of them is "active" so somebody is actually confirming all of the subscriptions.  So frustrating.  I've just been deactivating them every few days.  Does anybody know if these subscribers could do any harm??

[Ellen Dean]

Same here just this last week. All of a sudden 95 extra subscribers all ending @outlook.com