> Please don't do that. The overhead to check for no mail is trivial. That is not correct. Simple benchmarks will show you that checking for "no new mail"--not "no mail," which is not technically correct--creates substantial CPU load. For hosting providers, it is an undeniable cause of instability on client and server.
> In business, a "communication" often takes four or five retries. Huh? It may only appear to take four of five retries _if_ people make the utterly wrong assumption that e-mail is a real-time medium. Due to the size and number of messages that can be transmitted to one account in a given period, Users cannot be led to expect that SMTP latency will be less than 5 minutes, and their POP3 checks must be set accordingly. Anything else is suicide for client-side stability (the main cause of duplicate messages is overlapping POP3 checks). For users connecting over POP3 to the local LAN, while it may seem "cool" to try to fool them into thinking they're using Exchange internally by scheduling 1-minute checks, you must do proper benchmarking to determine whether a server's traffic patterns--and concurrent resource utilization by non-mail processes, which is often the case in small shops with one file/mail/db box--are up to the task. For the above reasons, for a hosting provider that's one of our clients, we built a solution a couple of years ago that would not report new mail if checks were performed more frequently than very 5 minutes (it will not even re-check the credentials). The only reason this service is no longer in use is that they scaled out their server farm to handle more traffic. --Sandy ------------------------------------ Sanford Whiteman, Chief Technologist Broadleaf Systems, a division of Cypress Integrated Systems, Inc. e-mail: [EMAIL PROTECTED] SpamAssassin plugs into Declude! http://www.mailmage.com/products/software/freeutils/SPAMC32/download/release/ Defuse Dictionary Attacks: Turn Exchange or IMail mailboxes into IMail Aliases! http://www.mailmage.com/products/software/freeutils/exchange2aliases/download/release/ http://www.mailmage.com/products/software/freeutils/ldap2aliases/download/release/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
