Auto-reply emails - out-of-office messages, acknowledgements, deflections, holiday notices - solve a real problem: people expect a response and silence costs you trust. Done well, an auto-reply sets expectations clearly enough that nobody minds the wait. Done badly, it adds noise without information.

Below: ten ready-to-use templates organised by intent, then a short how-to for setting them up in Gmail and Outlook, then a note on when an AI-assisted version starts to be worth it. The templates are written to be lifted verbatim - just swap names, dates, and a contact.

Standard out-of-office

The default. Short, dated, explicit about response time.

Hi - thanks for your email. I'm out of office until [DATE] and won't be checking messages until then. I'll reply when I'm back. For anything urgent, please contact [NAME] at [EMAIL].
Best,
[YOUR NAME]

Extended leave (more than two weeks)

Longer absences benefit from explicit triage of what won't happen and what will.

Hi - I'm on extended leave through [DATE] and will not be monitoring this inbox. Messages received during this period will not be answered on return - if your request still stands, please resend it after [DATE]. For anything that can't wait, [NAME] at [EMAIL] is covering for me.
Thanks,
[YOUR NAME]

Acknowledgement of receipt

For inboxes that need to signal "we got it" without committing to a timeline.

Thanks for your message - it's been received and I'll come back to you with a substantive reply within [X] business days. If anything changes on your end in the meantime, please reply to this thread to keep everything together.
Best,
[YOUR NAME]

Public holiday

Specifically dated, no "urgent contact" line - on a public holiday nobody on the team is reachable, and saying so plainly is better than implying someone is.

Hi - our office is closed for [HOLIDAY] on [DATE]. Email will be answered when we're back on [RETURN DATE].
Thanks for your patience,
[TEAM NAME]

Maternity / paternity leave

Clear handover, no ambiguity about who owns your work in your absence.

I'm on parental leave through [DATE] and won't be checking this inbox. For [CLIENT WORK / VENDOR QUESTIONS / BILLING], please email [NAME] at [EMAIL]. For everything else, [SECOND NAME] at [EMAIL] is the right contact. I'll reply to anything you send when I'm back.
Best,
[YOUR NAME]

End-of-week deflection

For Friday-evening or weekend senders when you want to set the expectation that the reply lands Monday without sounding evasive.

Thanks for your email. I check messages during business hours (Monday to Friday) and will reply by end of next business day. If this is genuinely urgent, please mark the subject with [URGENT].
Best,
[YOUR NAME]

"Not the right contact" deflection

For shared inboxes or generic addresses that frequently receive misrouted messages.

Thanks for getting in touch. This inbox handles [SUBJECT AREA] - it doesn't look like that's a match for your message. For [TOPIC YOU MENTIONED], please email [TEAM] at [EMAIL] who can help you directly.
Best,
[YOUR NAME]

Sales acknowledgement

For inbound sales channels where you want to acknowledge immediately and qualify lightly without sounding automated.

Thanks for reaching out - I want to make sure you get the right person on our side. Could you share a sentence on the problem you're trying to solve and roughly how many people on your team would use [PRODUCT]? I'll route you to the right contact and you'll hear back within a business day.
Best,
[YOUR NAME]

Support ticket acknowledgement

With a clear ticket reference so the customer can track and you can match the reply.

Thanks for the message - we've opened ticket [TICKET-ID] for this. Our support team works [DAYS / HOURS] and our typical first reply is within [X] business hours. You'll receive the response directly from the team member who picks it up.
Best,
[SUPPORT TEAM]

Bounce-back / no-reply replacement

For automated systems that previously sent from a no-reply address. Friendlier than "DO NOT REPLY", and points people to where they can actually get help.

This message was sent automatically and replies to this address aren't monitored. If you need help, please [CONTACT METHOD] - we'll get back to you within [X].

Setting up auto-replies

Gmail (vacation responder)

In Gmail, open Settings (the gear icon, then "See all settings"), scroll to the "Vacation responder" section near the bottom of the General tab. Set a start date, an optional end date, a subject, and the message body. Gmail sends the reply once per sender per 4 days by default - so repeat correspondents don't get bombarded.

Two checkboxes worth knowing: "Only send a response to people in my Contacts" (limits scope; useful for personal accounts), and "Only send a response to people in [your domain]" on Workspace accounts (keeps the message internal).

Outlook (automatic replies)

In Outlook, go to File → Automatic Replies (or Settings → Mail → Automatic replies in the new Outlook web). You can write separate messages for people inside and outside your organisation, schedule a date range, and optionally rules (e.g. forward messages from specific senders to a covering colleague while you're away). The internal-vs-external split is the feature people most often overlook - it lets you give colleagues more context than you give external senders.

When an AI assistant is worth it

Static templates are perfect for binary states (away vs. not away, holiday vs. work day). They start to feel coarse when the right reply depends on the message: a customer asking about pricing during your vacation needs a different acknowledgement than a recruiter following up. Setting up ten different vacation responder rules in Gmail to handle that gets unmanageable fast.

That's where an AI assistant earns its keep. Tools like Inboxer's AI triage classify incoming mail by intent before deciding how to respond - so the vacation acknowledgement to a customer can differ in tone from the one to a recruiter, both can route differently than a vendor invoice, and you don't maintain any rules. The trade-off is the usual one: you're trusting a classifier to read intent correctly, which is why approval-gated AI matters - the assistant proposes the right template, you approve.

For most people the right answer is to start with two or three of the templates above, set them up in Gmail or Outlook, and graduate to an AI assistant when the "one-size-fits-all vacation message" starts costing you real work.