I have noticed something of recent after moving to Gw 8.0 sp1, We have two domain names for our company, say MYCOMPANY.COM and MYCOMPANY.COM.CR, if an e-mail is sent to user using any of the domain names, we can receive the e-mails. But if an e-mail is sent to a distribution list that has a nickname i.e nickname@mycompany.com.cr, the e-mail is received, but if it is sent to nickname@mycompany.com, the e-mail never gets delivered.
And to be exact, we have 6 domain names and all behave the same way and I have tested with different distribution lists that have nicknames. I have failed to pin down the problem. Gw8.0sp1 on suse oes2sp1