POSTMASTER@, and ABUSE@, are both required accounts for every domain hosted.  Both accounts must be monitored and responded to by the MX server operator.
 
 
You have to setup a POSTMASTER account, for each domain, point it to a working account, monitor it, and respond to inquiries.
 
You also have to setup an ABUSE account, for each domain, point it to a working account, monitor it, and respond to inquiries.
 
An ALIAS can be used in lieu of a user mailbox to save licensing fees, if required.
 
RFC 822, 
RFC 1123 and 
RFC 2821 require that all domain's mail servers should accept e-mails to POSTMASTER@. To be compliant you can create an alias and forward all postmaster's e-mails to a valid mailbox.
 
 
RFC2142 requires that all domain's mail servers should accept e-mails to ABUSE@. To be compliant you can create an alias and forward all abuse's e-mails to a valid mailbox.
 
 
 
								Bruce Barnes
ChicagoNetTech Inc
brucecnt@comcast.net
Phonr: (773) 491-9019
Phone: (224) 444-0169
E-Mail and DNS Security Specialist
Network Security Specialist
Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/
Web and E-Mail Hosting, E-Mail Security and Consulting