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managing suspended versus invalid emails

Question asked by 39890 on Sep 18, 2013
Latest reply on Oct 15, 2013 by 2232
I just did a mail and received both "suspended" and "invalid" hard bounces.  

As best I can tell, suspended comes from a target domain blocking your mails to it.  But not all the users in that domain. e.g. If I send 100 mails to people at ABC.COM, I may get 20 that come back as suspended with a message like:   571 message refused.   

Invalid is due to a invalid email address.  I get invalid messages like:  550-Invalid Recepient and 550 5.1.1 <xxx@amgen.com>... User unknown.

2 questions:
1) Is the above difference correct?
2) If the difference is correct, what do you do with these mails?  Seems to me that invalid should be moved to junk and removed from the database.  Should I keep suspended and not block them from future mailings?  Will spam filters only block things periodically?

Thanks much!
 

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