Set Up Email Autoresponder on DirectAdmin

An email autoresponder automatically sends a pre-written reply to anyone who emails your address — immediately and without manual intervention. Common uses include out-of-office notifications, holiday messages, business-hours alerts, and instant inquiry acknowledgements.

DirectAdmin's built-in autoresponder lets you customize the message, set a start and end date, and configure how often the same sender receives the reply. This guide walks through every step.

How DirectAdmin Autoresponder Works

When the autoresponder is active, the mail server sends your custom reply message to the sender of each incoming email — typically within seconds. Important behaviors to know:

• The original email is still delivered to your mailbox normally — the autoresponder only adds an automatic reply
• An interval setting (e.g., 24 hours) prevents the same sender from receiving multiple autoresponses in a short period
• If you set a start and end date, the autoresponder activates and deactivates automatically — no need to remember to disable it

Setting Up an Autoresponder in DirectAdmin

1. Log in to DirectAdmin → Email Manager → Autoresponders
2. Click Add Autoresponder
3. Fill in the fields:
   • Email Address: select the address to enable the autoresponder on (e.g., contact)
   • Subject: the subject line for the auto-reply, e.g., "We received your message | Auto-Reply"
   • Message: the body of the reply (plain text — see templates below)
   • Start date / End date: the active period (leave blank for indefinite)
   • Interval: hours before the same sender receives another autoresponse — 24 hours is recommended
4. Click Create — the autoresponder is active immediately

Autoresponder Message Templates

1. Out of Office / Holiday

Subject: Out of Office: [Your Name] — Returns [Date] | Auto-Reply

Hello,

Thank you for your email.

I'm currently out of the office from [Start Date] to [End Date]
and will reply as soon as I return.

For urgent matters, please contact:
- [Colleague Name]: [email or phone]

Thank you for your patience.

[Your Name]
[Title]
[Company]

2. Inquiry Acknowledgement

Subject: We received your message | [Company Name]

Dear Customer,

Thank you for contacting [Company Name].

We have received your message and will respond within 1–2 business days.

For faster assistance:
- Line: @[YourLineID]
- Phone: [Number] (Mon–Fri, 9:00 AM – 6:00 PM)
- Website: [URL]

Best regards,
[Company Name] Team

3. After-Hours Notice

Subject: Received — We'll reply next business day | Auto-Reply

Hello,

Our office hours are Monday–Friday, 9:00 AM – 6:00 PM (UTC+7).

Your message has been received and we'll get back to you
on the next business day.

For urgent issues, please call [Phone] or message us on Line [ID].

Thank you!

4. Holiday / Festive Closure

Tips for writing an effective message: always state a clear "reopen date" so the sender knows when to expect a reply; include exactly one urgent contact channel (too many options create confusion); and keep it under five or six lines — the recipient mainly wants to know when you will be back.

Setting a Date Range

To activate the autoresponder only during a specific period (e.g., a two-week vacation):

• Enter the start date and time — the autoresponder activates at this moment
• Enter the end date and time — the autoresponder stops automatically
• If you leave end date blank, the autoresponder runs until you manually disable it

Always set an end date when using for vacations. Forgetting to turn off an out-of-office autoresponder is a common and embarrassing mistake. Setting an end date is the safest approach because the autoresponder disables itself automatically the moment you return — you never risk leaving an "I'm away" message running after you are back at your desk.

Autoresponder vs Vacation Message vs Ticket Auto-Reply

These three terms are often confused. All of them "reply automatically," but they operate at different layers and suit different situations. The table below helps you pick the right tool:

In short, the DirectAdmin autoresponder is best for general address-level replies — simple to set up and configure once. The Vacation Message in Professional Email with OX App Suite is ideal when you need formatted HTML and want to send different messages to colleagues versus outside contacts. A Ticket Auto-Reply belongs to a dedicated helpdesk system and is unrelated to the mail server itself.

Best Practices and Pitfalls to Avoid

Preventing Autoresponder Loops

If your autoresponder replies to another company's autoresponder, you can get an infinite loop of automated replies between the two servers. DirectAdmin's interval setting helps prevent this, but also:

• Always include "Auto-Reply" in the subject line — other mail systems recognize this as an automated message and skip their own autoresponder
• Set the interval to at least 24 hours
• Never enable an autoresponder on an address that subscribes to mailing lists — every list message will trigger an autoresponse to the entire list

Does Autoresponder Respond to Spam?

Yes — without a spam filter in place, your autoresponder will reply to spam too, including forged emails that spoof someone else's address in the From field. The result is that your mail server sends large numbers of replies to non-existent recipients (known as backscatter), which can get your server IP flagged as a spam source and even land it on a blacklist. Always enable SpamAssassin in DirectAdmin before activating any autoresponder on a public-facing address so spam is filtered out before it reaches the reply stage.

Be Careful About Revealing You're Away

Out-of-office messages typically state exactly when you are away, which is information a bad actor can exploit — for example, knowing an office is empty, or impersonating you to contact your team while you are unreachable. Reduce the risk by:

• Not disclosing your home address, personal phone number, or detailed reasons for your absence
• Using neutral wording such as "I am currently unavailable and will reply as soon as possible" instead of stating that you are travelling abroad
• Listing a shared team address (such as support@) as the alternate contact rather than a colleague's personal mobile number

Combining Autoresponder with Forwarding

You can run an autoresponder and a forwarder on the same address simultaneously:

1. Incoming email arrives at [email protected]
2. Autoresponder instantly sends the acknowledgement reply to the sender
3. Forwarder simultaneously sends the email to your Gmail
4. You read the email in Gmail; the sender already received confirmation

This combination is ideal for customer-facing addresses during business hours or while away.

Testing Your Autoresponder

1. Send a test email from Gmail or another external address to the autoresponder address
2. Wait 1–2 minutes
3. Check whether the autoresponse arrived in the sender's inbox
4. If not, verify in DirectAdmin that the autoresponder is enabled and the start date is not set in the future

FAQ

Can I use HTML formatting in the autoresponder message?

DirectAdmin's built-in autoresponder supports plain text only. For HTML autoresponses with branding and formatting, consider AsiaGB's Professional Email with OX App Suite, which provides a more advanced vacation message feature.

How do I disable an autoresponder?

DirectAdmin → Email Manager → Autoresponders → find the entry → click Delete or Disable. If you set an end date, it stops automatically without any action needed.

Will the autoresponder fire for every single email the same person sends?

Only once per interval period. If the interval is set to 24 hours, a sender who emails you three times in a single day will receive the autoresponse only once. The next time they can receive it is 24 hours after their first message.

How many addresses can have an autoresponder at once?

DirectAdmin lets you set an autoresponder on any email address you have created in the domain, and each address has its own independent autoresponder. For example, contact@ can send an inquiry acknowledgement while sales@ sends an after-hours notice — each with its own message and date range. There is no fixed limit beyond the number of addresses your package supports.

If I disable an autoresponder, do I lose the message I set?

If you use Disable, the message and settings are kept, so you can re-enable it later without retyping. If you click Delete, the configuration is removed entirely. Use Disable when you plan to reuse the same message again in the future.