There is this domain let's called "xxx.com" from a middle sized company which the registration is about to expire in 2 months.

Now i know the email they used to register with a DNS Registar and i will create an alias and opt-in in +/- *000 mailing lists to keep them with the inbox full. (The purpose is to try that they don't read their expiration notification)

If the goal is achivable can i change registar or do i have to register with the same?

Also they have an SMTP server that handles their email plus other small companies emails in the area.

Since if i'm succeful i don't know which usernames are in their SMTP so is there any server that allow carry / deliver any email inside the domain ex. @xxx.com which their passwords will be blank for their logon.

Is just an idea but thanks for all the help provided Mike.

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