问两个问题

if_800

一般imail 对硬件和软件的要求是怎么样的? <br>
比如50用户的,500用户的.......等等,谁能说一下什么配置比较合适,处理速度跟的上,并且不浪费系统资源吗?<br>还有在relay的选项里一般选择那一项比较合适,relay for local users 是不是只为自己服务器所创建的帐号服务?

钉子

我还是用官方的说法给你回答：<br>
１。System Requirements <br>
An Intel Pentium III 500 MHz or higher (multiple processors recommended for high mail traffic rates). <br>
256 MB RAM minimum. <br>
Microsoft Windows 2000 Server, Windows 2003 Server, or Windows XP (with Standard AntiVirus version only) . <br>
For best performance we recommend that the updated server versions of the operating systems be employed. Additionally, NTFS (rather than FAT) file system is recommended for increased operability and security. <br>
Network interface card installed and configured to use Microsoft's TCP/IP for the Windows operating system OR a dial-up TCP/IP connection. <br>
A full-time or dial-up connection to the Internet. <br>
Modem (optional, but required for mail-to-pager, mail-to-fax, and notifications). <br>
A static IP address. <br>
Hardware Environment <br>
IMail Server runs properly on the minimum hardware requirements recommended by the installed operating system. Performance and capacity increases are based on processor speed, RAM, and drive space. As with all server applications, it is recommended that you install IMail Server on the fastest and most powerful server that your budget allows. <br>
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２。SMTP Mail Relay options <br>
Mail relay occurs when IMail Server (or any SMTP server) accepts mail destined for another host and redelivers it to that host. A message that originates on a computer other than the IMail Server host and destined for another host must pass through the IMail Server (i.e., IMail Server must relay the message). If your users use a POP3 or IMAP mail client to send mail, then IMail Server needs to relay mail for them. IMail Server allows for the following mail relay options (listed in order from most secure to least secure): <br>
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No mail relay <br>
Relay mail for (Addresses) <br>
Relay mail for local hosts only <br>
Relay mail for local users only <br>
Relay mail for anyone <br>
Local mail (destined for the IMail Server host or originating from the IMail Server host) does not use the relay function. Note: During installation, you can select from four options: Relay for select addresses, No mail relay, Relay mail for anyone, and when upgrading: Do not change my existing local mail relay settings. After installation, you can change the relay setting in the SMTP Security tab in IMail Administrator. <br>
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No mail relay (recommended) <br>
The SMTP server will not accept mail destined for other hosts (any host not on the IMail Server machine). If all of your users send and receive mail from the same host that IMail Server is on or if they use Web Messaging to access mail, you can select this option. If you select this option, make sure all mail clients are set up to SMTP Authenticate; otherwise, the client cannot send mail to non-local email addresses. <br>
Relay mail for anyone (not recommended) <br>
The SMTP server accepts mail from any host that is destined for any other host, and redeliver that mail (i.e. become a mail gateway). This option is the least secure because it allows your server to be used by anyone to send mail to anyone. Some bulk mailers may take advantage of this capability to not only relay mail through your server, but to make it appear as if mail is originating from your server. <br>
If you select this option your server may be blacklisted for running an open relay. To prevent this you should select Relay mail for (Addresses). <br>
There are several other mail relay options available after installation including Relay mail for (Addresses), Relay for local hosts only, and Relay for local users only. <br>
No mail relay is the best option if you are unable to use Relay mail for (Addresses) because your users dial up using dynamic IP addresses. <br>
For more information on Mail Relay options and other security features, see the IMail Server User Guide. <br>
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