":sysmail"@Some-Group.Some-Org
Muhammed.Ali@Vegas.WBA
person@registry.organization
user@host.network
sender@registry-A.registry-1.organization-X
recipient@registry-B.registry-1.organization-X
recipient@registry-C.registry-2.organization-X
First.Last@Registry.Org
sub-net.mailbox@sub-domain.domain
Shared@Group.Arpanet
Shared@Group.Arpanet
Chamberlain@NBA.US
Childs@WGBH.Boston
Another@Somewhere.SomeOrg
Jones@Group.Org
Jones@Group.Org
Shared@Group.Org
Jones@Host.Net
Jones@Host.Net
Smith@Other.Org
Jones@Registry.Org
Jones@Registry.Org
Smith@Registry.Org
KDavis@This-Host.This-net
Sam.Irving@Reg.Organization
Group@Some-Reg.An-Org
Al.Neuman@MAD.Publisher
Balsa@Tree.Root
some.string@DBM.Group