The flow of delivering e-mail:
The three key element of sending e-mail are: MUA, MTA, MDA
MUA (Mail User Agent):
The PC of client cannot send mail directly. It must deliver mail by MUA.
No matter to send or to receive the mail, the Client user still has to use mail system by MUA that
provided by operation system. For example: Outlook Express in Windows is MUA. The main
function of MUA is to receive or send e-mail from mail master and provide the function for users to
browse and edit mail
MTA (Mail Transfer Agent):
When the user sending or receiving mails, they are both completed
by MTA. Basically, its functions are as below:
1. To receive the mail that sent by external master: when receiving the mails from external; only if the
recipient exists in MTA internal account then this mail will be received by MTA.
2. To send mail for user: Only if the user has the authority to use MTA, and then the mail can be sent
by MTA.
3. To let user to receive his/her own mail: The user can take the mails to his/her own PC from mail
master.
Generally the Mail Server we refer to is talking about MTA.
MDA (Mail Delivery Agent):
To let the mail that received by MTA be put in the Mailbox according
to its destination. Or by MTA to send the mail to the next MTA.
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Содержание RS-3000
Страница 1: ...1 RS 3000 Office UTM Gateway User s Manual ...
Страница 45: ...Figure 5 11 PPTP Connection Figure 5 12 Complete PPTP Connection Setting 43 ...
Страница 133: ...Figure15 3 Traffic Log Monitor WebUI 131 ...
Страница 142: ...Figure15 19 Complete Policy Setting 140 ...
Страница 183: ...Figure17 33 Create Folder WebUI 181 ...
Страница 185: ...Figure17 35 Select Folder for Spam Mail to move to 183 ...
Страница 187: ...Figure17 37 Compact SpamMail Folder 185 ...
Страница 189: ...Figure17 39 Copy the File Address that SpamMail File Store 187 ...
Страница 192: ...Figure17 42 Confirm that All of the Mail in SpamMail File had been Deleted 190 ...
Страница 194: ...Figure17 44 Create Folder Function WebUI 192 ...
Страница 196: ...Figure17 46 Select the Folder for Needed Spam Mail to Move to 194 ...
Страница 198: ...Figure17 48 Compact HamMail File 196 ...
Страница 200: ...Figure17 50 Copy the File Address that HamMail File Store 198 ...