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A mail server acts as an intermediate between the Internet and users when sending or receiving mails. The
format of email address looks like [email protected]. Info on the left side of at sign (@) indicates an
account name, the other side stands for the host name.
For instance, you are sending a mail to [email protected], your email software will go to your DNS server
for the IP address and mail exchanger record that corresponding to mail server. Mails will go to mail
exchanger before sending to the host server, in this case, it is yahoo.com.tw. If the DNS server has more than
one MX, then mails will be sent to the MX with the highest priority. Provided that there is no MX, mails will not
be delivered until the corresponding IP has found. When mails have been delivered to yahoo.com.tw, mails
will be distributed to the user according to its account name which shows on the left side of at sign (@).
Process of an email transmission:
The transmissions are divided into three parts, namely MUA, MTA and MDA.
MUA (Mail User Agent):
Whether sending or receiving mail, the end-user client must account on the
MUA which provided by the OS, for end-user client can not send mail directly. Outlook Express is a kind
of the MUA. It serves as a mail deliver and recipient, and enables user to view and edit mails.
MTA (Mail Transfer Agent):
Outgoing and incoming mails are all done by MTA. It allows user to:
1.
Receive mails from other host. As long as user has a account under MTA, then the user will be able
to receive mail.
2.
Sent out mails. On condition that the user has the authority, he will be able to send out mails.
3.
Receive personal mails. User can retrieve and view mails that saved on the mail server.
Usually, MTA refers to a mail server.
MDA (Mail Delivery Agent):
distributes incoming mails of MTA to local mail accounts according to their
account names or sends them to the next MTA.
Summary of Contents for ES-6000
Page 1: ...ES 6000 Email Server Appliance User s Manual ...
Page 53: ...52 Figure 4 46 Adding a Contact Figure 4 47 New Contact Added ...
Page 57: ...56 Figure 4 52 Create new Internet Account Figure 4 53 Define LDAP server IP address ...
Page 60: ...59 Figure 4 58 Configure LDAP server Advanced setting ...
Page 72: ...71 Step3 Web based mail for easy mail access Figure 5 5 Figure 5 5 Web Mail Interface ...
Page 74: ...73 Figure 5 9 Editing Personal Information ...
Page 77: ...76 Figure 5 13 Selecting the Desired Fields to Export Figure 5 14 Export Process Completed ...
Page 79: ...78 Figure 5 17 Clicking into Import Screen Figure 5 18 Address Book Successfully Imported ...
Page 81: ...80 Figure 5 20 Uploading a File to ES 6000 s Built in Web Disk Figure 5 21 File Uploaded ...
Page 96: ...95 Figure 6 12 Check all mails to retrieve Figure 6 13 Check all mails to resend ...
Page 127: ...126 Figure 6 56 Selecting Spam E Mails Figure 6 57 Forwarding Spam E Mails as Attachment ...
Page 134: ...133 Figure 6 65 Receive the periodic report ...
Page 135: ...134 Figure 6 66 The first page in periodic report ...
Page 136: ...135 Figure 6 67 The second page in periodic report ...
Page 137: ...136 Figure 6 68 The third page in periodic report ...
Page 138: ...137 Figure 6 69 The fourth page in periodic report ...
Page 139: ...138 Figure 6 70 The history report setting Figure 6 71 Receive the history report ...
Page 140: ...139 Figure 6 72 The first page in history report ...
Page 141: ...140 Figure 6 73 The second page in history report ...
Page 142: ...141 Figure 6 74 The third page in history report ...
Page 170: ...169 Figure 8 13 An E Mails Shown on a Smartphone Figure 8 14 Reading an E Mail ...
Page 179: ...178 Figure 9 4 The setting of backup immediately ...
Page 208: ...207 Figure 12 14 Adding a New Folder Figure 12 15 The Related Settings of a Folder ...
Page 209: ...208 Figure 12 16 Opening a Folder Figure 12 17 Uploading a File ...
Page 212: ...211 Figure 12 23 Downloading the Desirable File ...
Page 215: ...214 Figure 14 1 Display system info ...
Page 217: ...216 Figure 14 3 Search results ...
Page 218: ...217 Figure 14 4 Event log details ...