# Email Settings Atollon Mail operates as an independent email server. There are two basic ways to configure email reception in Atollon: ### **Atollon as the Primary Email Server** This option is the default system setting, where all email communication is directed to Atollon servers. ##### **Domain Settings at the Registrar** The customer must configure their domain's MX records to point to Atollon servers. Add the following MX records to your domain's DNS:
110 mx1.atollon.com
##### **Domain settings in the system** Into the system, enter a second-level domain (e.g., company.com), under which individual email accounts will be created. ##### **Sending messages** The sender's identity is the same as the specific email account, e.g., mailbox@company.com. ##### **Nastavení SPF** It is necessary to add the following TXT record to the DNS records of the domain "company.com": **Recommended SPF setting:**
1v=spf1 mx include: spf.atollon.com -all
If you also send emails from other servers, they must be included in the SPF rules as well. Example of what the record might look like when using multiple mail providers:
1v=spf1 mx include: spf.google.com include:\_spf.mailprovider.sk include:spf.atollon.com -all
### **Atollon as a secondary email server** This option is suitable if Atollon is intended to serve purely as a mail archiving tool (not as the primary email server), or if the goal is for Atollon to manage only a specific portion of the email communication (selected mailboxes). ##### **Domain settings in the system**
Into the system, you enter the settings for a third-level email domain (e.g., INSTANCENAME.atollon.com), for which only selected email mailboxes are created. On the primary email server (at the current email service provider), email forwarding is then set up for individual mailboxes from to . ##### **Sending messages** After creating the mailboxes, it is advisable to change the sender's identity within the Atollon system. Instead of , it is recommended to set it to . For this to function correctly, the DNS records for the domain "company.com" must be updated—specifically, the SPF rule must be supplemented—see below. **SPF Settings** Just as when using Atollon as your primary email server, you must add the following TXT record to the DNS records of the "**company.com**" domain: Recommended SPF settings: Just as when using Atollon as your primary email server, you must add the following TXT record to the DNS records of the "**company.com**" domain: **Recommended SPF settings:**
1v=spf1 mx include:spf.atollon.com -all
If you also send mail from other servers, these must also be included in the SPF rules. Example of what the record might look like when multiple mail providers are involved:
1v=spf1 mx include:spf.google.com include:\_spf.mailprovider.sk include:spf.atollon.com -all
#### **How to set up forwarding of your email to Atollon** **Office 365 Configuration Example** In the case of using Atollon as a secondary email server while utilizing Microsoft 365, it is necessary to enable forwarding to an external email address; a link to the instructions can be found [(here)](https://learn.microsoft.com/en-us/defender-office-365/anti-spam-policies-configure). In the **Admin Center**, select **Security**. Then expand the **Outbound spam filter policy (always ON)** menu and click the **Edit policy** button. Here, you need to change the setting from the default "Automatic – system-controlled" to **On – forwarding is enabled** and **Save** the changes. **Forwarding at the Email System Level** At the email system settings level, it is necessary to set up automatic forwarding (auto-forward) for each mailbox whose messages are to be delivered to Atollon – for example, from the address thomas@company.com to thomas@company.atollon.com.