postfix
postfix mta mail serveryou can replace sendmail with postfix
# yum remove sendmail # yum install postfix procmail
postfix configuration
PostFix configuration options are defined in main.cfPostfixAliases
PostfixCanonicalAddresses
PostfixRelay
PostfixVirtualAddresses
PostfixDebugging
see also
http://www.postfix.org/documentation.htmlhttp://www.postfix.org/docs.html
http://www.postfix.org/ADDRESS_REWRITING_README.html
email antivirus
If you decide to use postfix to receive emails you might also like the free libre open clamd, clamav & clamtk AntiVirus programREFERRERS
SystemServices