Whenever I send email to my dad's office (only my dad's office, this doesn't happen for any other address i send mail to) my email gets bounced back with:
----- The following addresses had permanent fatal errors -----
----- Transcript of session follows -----
550 5.1.2 <firstname.lastname@example.org>... Host unknown (Name server: companysmtp. company.net.: host not found)
This happens when I use two different POP3 email accounts with Outlook Express, AND when I use a Yahoo! account with my name. However, it does not happen when I use a Yahoo account with a different name. So, did my dad's office's antispam software suddenly start identifying my name as a spammer, and then refuse to deliver my email?
I've read that it could be becuase my ISP is associated with a spammer, but that's impossible becuase my ISP is provided by my university.
The ONLY reason I may suddenly by identified as a spammer is I wanted to see how "bouncing" worked, so I "bounced" a spam back to the sender of the spam.......would that somehow make my email account look like a spammer too?
How can I fix this?