How to Use Webmail Roundcube on Hosting — Send & Receive @Domain Email

Roundcube is an open-source Webmail client that lets you send and receive @yourdomain.com email directly from any web browser — no additional software required. Every AsiaGB Hosting plan includes Roundcube, accessible immediately from any device with an internet connection.

What is Roundcube?

Roundcube is a browser-based email client known for its clean interface and ease of use. It supports sending and receiving email, folder management, spam filtering, email signatures, and an address book — similar in convenience to Gmail, but all data stays on your own Hosting server, not Google's.

Accessing Webmail Roundcube

Setting Up Your Email Signature

A signature is text automatically appended to every email you send, such as your name, title, phone number, and website link. To configure it:

1. Click Settings (gear icon) in the top-right corner
2. Select Identities → click your email address
3. Scroll down to the Signature field and type your signature text
4. Check HTML Signature to enable formatting (bold, links, images)
5. Click Save

Managing Folders

Roundcube includes default folders: Inbox, Sent, Drafts, Spam, Trash. You can create custom folders to organize email:

• Right-click any folder in the Sidebar → Add Folder
• Name the folder and choose a Parent Folder if needed (subfolder)
• Click Save — the new folder appears in the list

Setting Up Email Filters

Filters automatically move emails matching specific criteria to designated folders — e.g., all newsletters move to a "Newsletter" folder:

1. Settings → Filters → click + to add a new rule
2. Name the filter and set conditions, e.g. Subject contains "Newsletter"
3. Set Action: Move to Folder → select the destination folder
4. Click Save

Adding Contacts (Address Book)

Roundcube includes a built-in Address Book to save contact names and email addresses:

• Click the Contacts menu → Add Contact
• Fill in name, email, phone, and other details
• When composing email, type the name in the To: field — Roundcube autocompletes from your contacts

Accessing Email on Mobile

Roundcube supports responsive design and works in mobile browsers. However, for push notifications, configure IMAP in a dedicated Mail App (Gmail App or Outlook) using these settings:

• IMAP Server: mail.yourdomain.com Port 993 (SSL)
• SMTP Server: mail.yourdomain.com Port 465 (SSL) or 587 (TLS)

Roundcube Email Security Best Practices

Keeping your email account secure is critical, especially when accessing it from a browser on a shared or public device. Roundcube provides several built-in protections, and following these practices will significantly reduce your risk.

Use a Strong Password

Set a password that mixes uppercase, lowercase, numbers, and special characters — at least 12 characters long. Avoid dictionary words or personal information that could be guessed. Update your email password at least once every six months.

Always Log Out After Each Session

After finishing your email session — especially on a shared or public computer — always click the Logout button in the top-right corner. This ends your Roundcube session immediately and prevents unauthorized access.

Watch Out for Phishing Emails

Never click links or download attachments from unknown senders. Roundcube includes built-in spam filtering, but you should also manually mark suspicious messages as Spam to improve future filtering accuracy for your account.

Session Timeout Behavior

Roundcube automatically logs you out after a period of inactivity (session timeout). The duration depends on your server configuration. If you use Roundcube on a public network, close the browser tab after logging out for an extra layer of protection.

Advanced Roundcube Settings

Beyond the basics, Roundcube offers additional configuration options that make managing your email more efficient. Exploring these settings can noticeably improve your day-to-day workflow.

Change Theme and Interface Language

Go to Settings → User Interface to switch between available Roundcube themes. You can also change the interface language to match your preference — Roundcube supports multiple languages including Thai and English.

Set Up an Auto-Reply (Vacation Message)

When you are away and cannot respond to emails, set up an auto-reply in DirectAdmin → Vacation Message. The server will automatically respond to every incoming email during the period you specify, keeping your contacts informed.

Maximum Attachment File Size

The maximum attachment size when sending email through Roundcube depends on your Hosting plan's PHP upload limit, typically 25–50 MB. For larger files, use a cloud storage service (Google Drive, Dropbox) and share the download link in your email instead.

Browser Notifications for New Email

Some versions of Roundcube support browser notifications when new email arrives while the browser is open. Allow this notification when prompted by your browser to avoid missing important messages while you work in other tabs.

Roundcube vs Other Webmail Clients

DirectAdmin Hosting includes several Webmail options. Understanding the differences helps you choose the right tool for your needs.

For most users who need reliable email sending, receiving, and inbox management, Roundcube is the recommended choice. Its modern interface, fast loading, and excellent mobile support make it the clear winner for day-to-day business email.

Troubleshooting Common Roundcube Issues

Even with a reliable Hosting setup, you may occasionally run into Roundcube issues. Here are the most common problems and how to fix them.

Outgoing Email Goes to Recipient's Spam Folder

This is usually caused by missing DNS authentication records. Ensure your domain has SPF, DKIM, and DMARC records configured in DirectAdmin. These records tell receiving mail servers that your domain is authorized to send email, significantly reducing the chance of landing in spam.

Cannot Log In to Webmail

First, confirm the URL is correct (yourdomain.com/webmail or webmail.yourdomain.com). Then check the AsiaGB server status page at asiagb.com/status.html to ensure Hosting services are running normally. Finally, try clearing your browser cache and cookies before logging in again.

Emails Loading Slowly or Attachments Failing

Slow loading often indicates the mailbox Disk Quota is nearly full. Check your quota in DirectAdmin and delete old emails or large attachments. You can also archive older emails to free up space without permanently deleting important messages.