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Relay, a function that MTA transfers mails to another MTA, functions when MTA has learned that mail
recipient does not exist on itself will transfer mails to another MTA.
A mail server which could be used to transfer mails by anyone is called Open Relay. To avoid this,
presently most of mail servers set Relay as disabled. Only local host can utilize relay to receive mails
that specified for this MTA accounts form Internet. Basically, there is no doubt that relay enables MTA to
receive mails, yet there is a drawback in it. Since MTA normally allows certain trusted mail servers with
specified IPs and segments to relay, so that client user could use mail services without limitation while
other unspecified users been blocked. Thus, SMTP Authentication is invented to solve this problem.
SMTP Authentication, a mechanism that MTA inspects sender account and password from MUA, happens when
mails transfer from MUA to MTA. It has a benefit of enabling relay function to authentic MTA accounts rather than
certain trusted domain name or IP. Because of SMTP Authentication, MTA will neither accept incoming mails nor
provide mail delivery service unless the sender is authentic.
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 ...