The Edge Transport server accepts incoming mail from the Internet and routes outbound mail to the
Internet based on DNS resolution of Mail Exchanger (MX) records of Internet domains or it can be
configured to forward mails to another smart host, such as an ISP or a message compliance system. Send
and Receive Connectors are also configured on the Edge Transport server to control how a message is
routed. The Edge Transport server also provides a message address rewrite agent. When companies
merge and want to present a single email address for all outgoing emails irrespective of the internal
company, address rewrite becomes invaluable.
Message hygiene is achieved by providing different layers of spam filtering and implementation of
anti - spam and anti - virus agents, thus blocking viruses and spam at the network perimeter. In addition,
transport rules act on messages that meet certain configured criteria, spam confidence level (SCL)
ratings, or have certain message contents and reject or quarantine these messages as configured.
The Edge Transport server ??™ s architecture is identical to that of the Hub Transport server. Both implement
the core transport components mentioned in Chapter 7 . The key differences are in message
categorization and implementation of transport agents.
Pages:
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343