when I send messages to certain contacts, they keep returning

  • Thread starter Thread starter Mauricio
  • Start date Start date
M

Mauricio

I have contacts with the same domain which I always send e-mails to. Somehow
now some keep returning, I even have an e-mail of my own with that same
domain and now I can not receive it. Some work some don´t. How can I secure
that these e-mails do not keep returning?
 
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