How Do I Manage DNS And Mail Settings Using ISPmanager? IntroductionManaging DNS and mail settings in ISPmanager allows you to control how your domain connects to websites, email servers, and external services. Correct configuration ensures reliable website access and uninterrupted email delivery. What Are DNS and Mail Settings?DNS (Domain Name System) translates domain names into IP addresses, while mail settings define how emails are sent and received for a domain. How to Manage DNS RecordsLog in to ISPmanagerGo to Domains → DNS ManagementSelect your domainAdd, edit, or delete DNS recordsSave changes Record TypePurposeAPoints domain to IPv4 addressAAAAPoints domain to IPv6 addressCNAMEAlias for another domainMXHandles mail routingTXTUsed for verification and security How to Manage Mail SettingsNavigate to the Mail section.Click on the toolbar. 3. Fill in the fields in the Mail settings form: Email limit — the maximum number of emails that can be from 1 mailbox per hour. The limit can be overridden in the user settings or mail settings.Max. attachment size — the maximum size of 1 attachment (picture, video, audio file, etc.) in an email. Default value: 2 MB. It is recommended not to exceed the mail clients’ limits on the total size of attachments so that emails are not rejected.Max. size of an email — the maximum size of 1 email, consisting of the body (text, HTML formatting, etc.) and attachments. The size of the email must be at least 33% greater than the size of 1 attachment. Otherwise, RoundCube will automatically reduce the maximum file size in the email. Default value: 50 MB.Max. execution time — the maximum execution time of 1 RoundCube PHP script. If the script processing time is exceeded, PHP stops the script and displays an error notification when sending an email or loadingan attachment. Default value: 30 sec. 4. Save changes ConclusionManaging DNS and mail settings correctly in ISPmanager is essential for maintaining website availability and reliable email communication. By properly configuring DNS records such as A, CNAME, MX, and TXT and managing mail domains and MX priorities you ensure smooth domain resolution and uninterrupted email delivery.Always follow best practices like backing up DNS zones, allowing time for DNS propagation, and enabling email authentication methods such as SPF, DKIM, and DMARC. Regular reviews of DNS and mail configurations help prevent outages, reduce security risks, and improve overall service stability. Need Help?If you face issues accessing Plesk or forgot your credentials, contact our support team: Email: support@bigcloudy.com Submit a support ticket FAQ How long does it take for DNS changes to take effect?DNS changes usually take a few minutes to 24 hours to propagate globally, depending on the TTL (Time to Live) value and ISP caching. Can I manage DNS if my domain is registered elsewhere?Yes. As long as your domain’s nameservers point to ISPmanager, you can manage all DNS records from the control panel, even if the domain is registered with a third-party registrar. What happens if MX records are misconfigured?Incorrect MX records can cause:Email delivery failuresEmails going to spamInbound or outbound mail not workingAlways verify MX priorities and mail server hostnames after making changes. Is it safe to delete unused DNS records?Yes, but only if you are sure they are not required. Deleting active records (such as A, MX, or TXT used for verification) may cause website or email downtime. It’s recommended to back up the DNS zone before removing records. Do I need SPF, DKIM, and DMARC for email to work?Email can function without them, but SPF, DKIM, and DMARC are strongly recommended. They:Improve email deliverabilityReduce spam and spoofingIncrease trust with email providers
