Sending legit emails: Can I use fake FROM and REPLY-TO names?

Prime

New member
May 7, 2011
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I plan to use a PHP or Perl script to send emails thru the servers of my legit domain.
Not real bulk: only 200 per day with a 2-3-minute pause between each.

I created a Catchall address at my domain: Catch@MySite1.com.

I plan to have the script randomly generate the FROM addresses,
Like Bob364@MySite1.com and Joe86@MySite1.com

The question:
Can I send emails From those random-generated names thru that Catchall account?
That is: using the Catchall account's Username & Password?

Will that work?
And still have the FROM and the REPLY-TO look like Pete927@MySite1.com, or whatever?

Thanks very much.


Prime