Smart SMTP Relay
SMTP Relay refers to whether or not someone can use your server to send emails on your behalf from an external machine. However, this function often allows unscrupulous users to use the server as a tool for spamming, so most email servers on the market disable this function. Intelligent SMTP Relay aims to prevent this misuse while allowing legitimate users to use the SMTP service smoothly.
The setup is very simple: first, go to [Server Settings] -> [Enable SMTP Relay] and [Enable IP Restriction], and keep the [IP Allow List blank].
With these settings, when you want to send an email, first check for new emails via POP3 to enable your SMTP Relay permission. This allows you to send emails via RaidenMAILD. (Because most email clients usually receive emails before sending them, this means that users can still send emails successfully without changing any settings on their client-side email software.) This function is commonly known as POP before SMTP.
IP Restrictions
You can decide who can use your SMTP Relay function and who is not allowed to connect to your server by editing the [IP Allow List] and [IP/Domain Deny List].
Filters for subject lines, original email data, and attachment file names; supports PCRE regular expression comparison.
Title filters are designed to prevent your users from receiving spam, such as advertising, pornography, and viruses. All you need to do is enter a specific string from the subject line of these unwanted emails into the title filter. The next time RaidenMAILD receives emails matching this string, it will handle them according to its email rules: discard them, mark them with a warning, move them to the user's unverified inbox, or move them to another mailbox.
Email source code filtering compares the original content of the email, making it a more sophisticated filtering method. Especially when combined with the conditional definitions of PCRE regular expressions, it can effectively check the email format.
The attachment file name filter filters email attachments. You can define the email to exclude files containing dangerous names such as .exe, .bat, .com, etc., to prevent users from executing these files out of curiosity and causing computer system infections or damage.
Email mailbox capacity limit
Email mailbox capacity limits allow administrators to determine the maximum amount of space a user can have in their mailbox, expressed in MB.
Multiple domains corresponding to a single account
Multiple domain mappings allow you to receive emails from multiple domains pointing to this server using only one account.
For example, 123.com.tw and 456.com.tw are two email addresses from different domains, but they both point to the same RaidenMAILD. If "test" is an account on the server, as long as the domain in the account's properties is set to Local Domain, regardless of whether you send emails to test@123.com.tw or test@456.com.tw, this user will receive emails from both domains in their mailbox.
Operated as a system service
With the help of the RaidenMAILD Service Installer, RaidenMAILD can be registered as a system service. When the system starts, it automatically starts RaidenMAILD and along with a health check process, automatically restarts the program if RaidenMAILD malfunctions to ensure the normal operation of the email service.
The resend mechanism allows you to set additional recipients for bounce notifications.
When the server encounters a mail delivery failure and generates a bounce message, it can additionally notify specific mailboxes so that administrators can understand the reason for the bounce message in advance and take proactive measures.
SMTP and POP3 restrictions
Administrators can set restrictions when your server is sending and receiving emails.
For example: What is the maximum size of an email in KB? How many KB of data can a user send in total during this connection? What is the maximum number of recipients in a single email? What is the maximum number of emails that can be sent in a single connection? What bandwidth speed is required to send the emails the user wants to send...etc.
Event Log
RaidenMAILD offers several ways to log events. You can log all messages on the screen to a file, log detailed SMTP/POP3/IMAP4 commands, log suspicious error commands, or log dedicated messages for statistical purposes.
Multilingual Web Mail
With just a browser, you can connect to servers worldwide to read, write, delete, and download emails. It's easy and convenient!
Web Mail template support
The templates currently include a login screen (\templates\login.html), a content page header (\templates\top.html), a content page header left (\templates\left.html), a content page header right (\templates\right.html), CSS files, etc. Personalized or corporate webmail can be easily created! More than a dozen newly designed templates are already available for you to choose from.
Dynamic IP Assignment
If the host's IP address changes, the system can automatically detect and start listening on the new IP address, which is suitable for dynamic domains.
Support for attaching messages at the beginning/end of emails
This feature allows you to append specific text to the beginning or end of emails sent to or received from abroad.
Automatic reply emails
Automatic reply emails are emails that users can set up to be automatically replied to via Webmail. This feature is typically used when a user is unable to reply to emails for a period of time and therefore needs to automatically reply to the sender to inform them of the situation. For example, a user traveling abroad needs to inform the sender that they are unable to process emails at this time.
Automatic forwarding of letters
Emails sent to this address can be automatically forwarded to a specific address (via Web Mail settings).
Back up all inbound and outbound emails.
You can set up backups of all outgoing emails to a specific account, or you can configure the user account settings to back up a copy of an email to a specific account as well.
Event processor
By configuring the server to automatically execute external programs such as .exe or .py upon receiving emails, RaidenMAILD gains limitless data processing capabilities.
Server Relay
When direct mail to the recipient's server is not possible, you can configure another SMTP host as a proxy.
Mass mailing mechanism
Mass mailing isn't just about using group mailing software with multiple connections. Raiden offers a mass mailing mechanism that automatically breaks down large email lists into N parts, processing large volumes of emails with N times the efficiency.
If you have EDM (email direct marketing) needs, we highly recommend using the ultimate version's exclusive mass mailing master feature.
SMTP authentication can be disabled.
If you do not want SMTP to provide email verification for your account, you can turn it off and only allow the administrator to set a specific IP address to use the SMTP service to forward emails, thus meeting the organization's security needs from a policy perspective.
SSL/TLS service
After applying for credentials, you can enable secure channel services such as SMTP TLS / POP3 SSL / IMAP4 SSL. It is recommended that everyone enable these services to comply with industry security standards.
MultiPOP External Mailbox Receiving Function
You can allow users to set up their external mailboxes and receive emails into their mailboxes, thus achieving the need for unified, convenient, and fast email reception.
Online account application mechanism
You can let users apply for your mail server account through a webpage, and choose whether to approve it automatically or manually, which is very practical.
Active Directory Account Integration
You can directly use accounts from Active Directory as accounts in your mail server, and in a flash, you can add all company employees from Active Directory to the mail server user list.
Prevention and control mechanism for advertising letters
Currently, there are several mechanisms to prevent spam messages, such as SPAMHAUS, SORBS, Reverse (including SPF), greylisting checks, and interactive verification by live agents (ISV), and weekly schedules can also be defined.
Supports various databases
User data can be sourced from either a text file or a database. Integration is incredibly easy.
Dual SMTP services
Dual SMTP services can be paired with various gateway software to form a complete front-end and back-end system. Different user interface services can also be enabled for dual SMTP, allowing for different verification and routing mechanisms in terms of policy.
Alias email
You can create alias email addresses for users outside of their accounts for them to use in the outside world. Aliases have the advantage of being created and used at any time, and can be deleted or deactivated at any time without affecting the use of the original account.
Daily generated advertising email list report
The external program SpamListMaker.exe can generate a daily report of the emails a user receives in their spam inbox. The deletion and movement of these spam emails can be managed through a web-based interface.
Integrated Windows Firewall
RaidenMAILD Ultimate Edition supports synchronization with Windows Firewall.
Malicious IP Collector
The system is fully automated in helping you identify which IPs are consistently and frequently attacking your servers, and then adds them to your firewall or IP denial list to block them, greatly reducing the threat of DDoS attacks.
Mass Mailing Master (Ultimate Edition Exclusive)
Bulk email software uses domain classification for email delivery and employs a lightweight email sending design. By sending emails in fixed quantities and at set times, it aims to minimize the recipient's perception that you are sending a large number of emails and thus avoid being blacklisted.
IPv6 support (Ultimate version only)
IPv6 is the next-generation network protocol. In response to government agencies' recognition of IPv6 as a key network protocol support project, they have begun to support the shared mode of IPv6+IPv4.
Cloud Drive on Webmail(Ultimate Edition Exclusive)
Webmail has a built-in cloud drive feature that allows users to upload files for anonymous or targeted sharing, and can set the sharing period and the automatic file recycling time.
Client-side transport functionality supports TLS/SSL (Ultimate Edition exclusive).
To support TLS/SSL for client-side transmission functions on the server, the currently supported features include MultiPOP (retrieving external mailboxes), Backup SMTP (backup SMTP host), and SMTP Routing Table (server relay forwarding). All three of these features can be configured with TLS/SSL connections.
For example, with this feature, you can use MultiPOP to retrieve emails from POP3 addresses such as Gmail, Hotmail, and Yahoo. You can also use a server relay to forward emails via Gmail, Hotmail, or Yahoo.
Email Audit (Ultimate Edition Exclusive)
You can configure account A to require verification by account B before the system will send the email.
DKIM (Ultimate Edition Exclusive)
It can be set to require DKIM signature when sending emails to the recipient, so that the recipient can check for advertising emails.
Supports sending new message notifications to mobile phones or Telegram apps. (Ultimate Edition Exclusive)
You can use Webmail to set up notifications to be sent to your phone or Telegram app when emails based on specific criteria arrive.
Server relay functionality authentication supports the industry's highest security authentication mechanism, OAuth2. (Ultimate Edition Exclusive)
You can use OAuth2 authentication within the server relay function to find Gmail/Outlook to send emails on your behalf.
Supports NTLM authentication mechanism
It supports NTLM authentication mechanisms for SMTP/POP3/IMAP4, which means it already supports secure password authentication in Outlook server settings.