When you import an address file, promio.connect checks different things. If the address file is uploaded, choose Addresses > Lists, click on the imported target group, and look at the logfile.
In the example, you can see that 2012 addresses should be imported.
2011 addresses are left after the syntax check. So in some addresses, for example, the @ was missing.
1977 addresses are left after the blacklist check. 34 addresses are therefore in the negative list and will not be imported.
the matching criterion is mail
563 addresses have already been in the database.
1414 new addresses were found.