How should I handle replies to cold emails, including "not now" and "unsubscribe"?
Read every reply within a day and sort it: interested, not now, not interested, unsubscribe, wrong person or other. Answer interested replies personally, honour unsubscribes at once (CAN-SPAM allows 10 business days, Yahoo asks for 2 days), thank "not now" once, and ask wrong-person replies for the right contact. Ignore out-of-office auto-replies.
Published by GrowFast. Last updated 2026-11-13. We make GrowFast, so weigh our side accordingly. Markdown version: /solutions/handle-replies-to-cold-emails.md.
Why it happens
Replies are where outbound pays off or damages you. A slow answer to an interested person loses the moment. An ignored unsubscribe becomes a spam report, and spam reports hurt the whole sending domain. Handling them well is mostly about speed and sorting.
Auto-replies complicate it. An out-of-office message arrives from the person's address but says nothing about interest, so counting it as a reply ends sequences that nobody read.
The fix that works without GrowFast
- Ignore auto-replies, then read everything else the same day. Out-of-office and delivery notices are not answers. Real replies deserve a human reading within a day.
- Sort into six types. Interested, not now, not interested, unsubscribe, wrong person, other. Sorting first stops you answering an unsubscribe with a pitch.
- Answer interested replies personally and quickly. Reply in your own words with one concrete next step, such as two times or a booking link.
- Thank "not now" once. A short note, a reminder in your calendar for a few months, and no further follow-ups.
- Thank "not interested" and suppress. No argument. Put the address on your suppression list.
- Honour unsubscribes immediately. Remove the person from every campaign, not just this one. CAN-SPAM requires honouring an opt-out within 10 business days and Yahoo asks bulk senders for 2 days, so doing it at once is the safe line.
- For wrong person, ask who is right. "Thanks, who would be the right person?" Many will tell you. Do not email the wrong person again.
- Log it. Keep a line per reply with type and date. It is your record that an opt-out was honoured.
| Reply type | What it means | Do this | Follow-ups |
|---|---|---|---|
| Interested | Wants to talk or know more | Answer personally within a day with a next step | Stop |
| Not now | Maybe later | Thank once; remind yourself in a few months | Stop |
| Not interested | A clear no | Thank them; suppress | Stop |
| Unsubscribe | Do not write again | Suppress everywhere at once; no pitch reply | Stop |
| Wrong person | Right company, wrong contact | Ask who is right; do not write again to this person | Stop |
| Other | A question or something unclear | Read and answer as a person | Stop |
| Out-of-office or auto-reply | A machine, not a decision | Ignore | Continue |
When to use GrowFast
Replies that reach GrowFast (that is how the managed address works) are sorted into interested, not now, not interested, unsubscribe, wrong person and other. They stop that contact's follow-ups, reach you by email with Reply-To set to the prospect so you can answer from your inbox, and arrive with an AI-drafted answer you can edit and send from GrowFast. An unsubscribe suppresses the address on every GrowFast account. Out-of-office and other machine replies are recognised and change nothing. Prospects who reply interested get a link to your booking page.
send_reply answers a prospect from the agent and delivers real email that cannot be recalled, so use it only when you have told the agent to.
When it is not the right tool. Reply sorting is built around the managed address, where replies are delivered to GrowFast. If you send from your own domain, confirm where your replies arrive before relying on the automatic stop of follow-ups.
Plans and limits are on the pricing page.
Ask your AI assistant
Paste this into an assistant that has the GrowFast MCP server connected. The tools it uses need the full server with an API key.
Assign to GrowFast: export my outreach history (export_outreach) and list every contact who replied, with the reply category. Don't draft or send anything. Show me the list so I can decide who to answer and approve each reply.
Tools used: export_outreach
FAQ
How fast must I honour an unsubscribe?
The FTC says within 10 business days, and the mechanism must keep working for at least 30 days after you send. Yahoo asks bulk senders to honour unsubscribes within 2 days. Do it immediately.
Can I ask someone why they unsubscribed?
Do not. The FTC says you cannot require anything beyond an email address, or make them take extra steps, to honour an opt-out.
Should I reply to a "not interested"?
A one-line thanks is fine. Do not argue or ask again.
Can an AI answer replies for me?
A draft you edit and send is fine. Letting an agent send replies on its own is a decision to make deliberately, because a sent email cannot be recalled.
Sources
- FTC, CAN-SPAM Act: a compliance guide for business (page modified 2025-07-22) (read 2026-11-13)
- Yahoo Sender Hub, Sender requirements and best practices (read 2026-11-13)