Tammy, please elaborate what do you mean by bad e-mails? 
And please elaborate how inputting "bad" e-mails into while inviting people can banned your main e-mail, because of those "bad" e-mails? 

Thanks in advance. 

bad emails can be a list of known people that just love to mark emails as spam 

bad emails can just be none existent email address 
the more mail sent to none existent email address raises your spam score 

idiots can even put in one email over and over 

every email provider states not to use your main site email address for sending bulk mail or invites 
they even say its better to use separate email address for join and site activity 

i have a list of over 200 bad emails from my site where idiots have joined my site and then been pricks and marked my site mail as spam  
now i can go to any oxwall powered site and input them bad emails as i know they will mark anything as spam and get the sites main email address marked as spam 
in few hours of me do it i could cripple any oxwall powered site 
no one can join as no mails delivered
no site members receive any mail 

and it would take the site months to recover 

even the invite mail template spamasson hates it as its not well formated 

and it has no list unscuscribe 
and i think u deleted that post
on no emails from the site have list unsubscribe headers 

Tammy one request per topic, please

You created a post regarding contact importer and main site e-mail. 

We already have the post regarding unsubscribe header  and links http://www.oxwall.org/forum/topic/45826

ok

Thanks, this is a reasonable suggestion, we have passed it to our devs. 

Thank you