User`s guide

Synology DiskStation User's Guide
Based on DSM 4.1
92 Chapter 10: Host Websites, Email Server, and Print Server
Before you start
Register a domain name for your IP, or apply for a DDNS hostname.
Note: For more information about registering a DDNS account for Synology DiskStation, see "Register a DDNS
hostname for Synology DiskStation" on Page 43.
 When applying for a domain name or dynamic domain name, please fill the MX (Mail eXchanger) record of
mail domain with your mail server (that is the FQDN of Synology DiskStation).
For example, if the mail server is mail.synology.com, then fill the MX record with mail.synology.com.
 Go to Main Menu > Control Panel > User and enable User Home service to allow users to store their mail
messages in their home folders. Otherwise, they will not be able to send or receive mails.
Note: For more information about User Home, see "Create User's Home Folder" on Page 58.
Confirm the port forwarding settings:
You should follow the table below to setup port forwarding if NAT is required.
Protocols SMTP POP3 IMAP IMAPS POP3S
Port
25 110 143 993 995
Note
IMAPS: IMAP over SSL/TLS
POP3S: POP3 over SSL/TLS
Set up Mail Server
Go to Main Menu > Package Center to install and run the Mail Server package.
To view overall status:
Click the Overview tab to see the information of services status, the amount of mails in mail queue and mail
activity statistics.
To set up SMTP:
1 Tick Enable SMTP to deliver and receive mails.
2 Tick SMTP Authorization is required if you want to prevent your mail accounts from being used as a
spammer.
Note: If you use this option, your users must provide their Synology DiskStation user accounts and passwords for
authentication while setting SMTP server in their mail clients. Take Outlook Express, for example, you can enable
the option at My server requires authentication in Tools > Accounts > Mail Account > Properties > Servers.
3 Limit email size by specifying Maximum size per email.
4 If Enable SMTP-SSL is ticked, SSL secure connection will be supported when sending emails.
5 If Ignore authorization for LAN connections is ticked, all connections except for LAN connections will have
to provide user account and password for authentication.
6 Set a domain name for Mail Server by filling in the Domain name field. To configure multiple domain names
for Mail Server, click the Additional Domain button to open the setting window.
7 Tick Enable SMTP Relay to send mails via other SMTP Relay servers.
To create an alias:
Click the Alias tab and click Create. You can
create an alias to group many email addresses into one.
To enable IMAP/POP3:
Click the IMAP/POP3 tab to enable IMAP/POP3. You must enable at least one of the protocols (POP3, POP3
SSL/TLS, IMAP and IMAP SSL/TLS) to receive mails via mail clients.
To enable spam filter:
Click the Spam Filter tab and tick the options based on your needs to avoid receiving junk emails.