Current Architecture

1
Current Architecture
Outside world
NNTP
CYRUS.ANDREW.CMU.EDU
ANDREW.CMU.EDU
SMTP
SMTP
IMAP
SMTP
SMTP
SMTP.ANDREW.CMU.EDU
Mail Clients
SMTP
2
Future Architecture
Outside world
NNTP
CYRUS.ANDREW.CMU.EDU
LMTP
Back-end servers
IMAP GATEWAY
IMAP
ANDREW.CMU.EDU
ACAP Servers
SMTP
IMAP
LMTP
LMTP
Front end proxies
sieve
SMTP.ANDREW.CMU.EDU
SMTP
LMTP
Mail Clients
IMAP
LDAP.ANDREW.CMU.EDU
SMTP
3
Animation
Outside world
NNTP
CYRUS.ANDREW.CMU.EDU
LMTP
Back-end servers
IMAP GATEWAY
IMAP
ANDREW.CMU.EDU
ACAP Servers
SMTP
IMAP
LMTP
LMTP
Front end proxies
SMTP.ANDREW.CMU.EDU
SMTP
LMTP
Mail Clients
IMAP
SMTP