Campaign emails in Hunter are sent automatically within your chosen sending window and according to your daily sending limit.

The exact timing depends on several factors — like other active campaigns, provider limits (e.g., Gmail, Outlook), and your account’s sending settings.

You can check your campaign’s status, progression, and next estimated send time directly in the Campaigns section. From there, you can also view queued or scheduled emails.

For a full breakdown of sending logic, limits, and campaign statuses, see: When will my campaigns be sent?

Your daily sending limit depends on the type of email account you’ve connected:

Hunter sets a default of 15 emails per day to protect your sender reputation. You can increase this gradually in your Campaign Settings once your domain is warmed up.

Yes — you can verify your leads before sending to reduce bounces and protect your email reputation.

You can:

Yes — you can schedule your campaign to start on a specific day.

Go to your email campaign’s Settings section and enable “Start the campaign on a specific day,” pick your date, and click Save Schedule.

Your campaign will show as Planned until sending begins, and the start date will appear in the campaign list.

Yes — follow-ups can be sent in the same email thread as the initial message.
If you leave the follow-up’s subject line blank, it will automatically use the original subject and stay in the same thread.

You can send up to 5 follow-ups in each campaign.

For every follow-up, you can set a waiting period between 1 and 30 days before it’s sent automatically.

If your campaign isn’t sending, it’s usually due to its status or settings — for example, the campaign might be paused, outside the sending window, have reached the daily limit, or the email account is disconnected.

Check the campaign’s status in Hunter to identify the reason (e.g., On Hold, Error, Paused) and apply the suggested fix.

💡 Common causes include:

See the full troubleshooting guide for campaign sending issues →

Hunter allows you to send yourself a test email from the Content section of your email campaign, to see how your content will look.

If your test email hasn’t arrived, start by checking:

If all looks fine, it could be a deliverability issue with your mailbox or domain. Check your sender reputation or ensure SPF and DMARC records are set up.

To check your deliverability, we suggest using one of these services:

👉 If the issue persists after performing all of the checks above, please don't hesitate to contact us for further troubleshooting.

If you see an Error status while sending through an Outlook or Gmail account, it usually indicates an issue with your email provider or rate limits.

Below are the most common error codes and how to fix them:

While Hunter doesn’t currently include an A/B testing feature, you can create two separate campaigns and split your lead list to test different versions manually.

To save time, you can duplicate an existing campaign, which copies the email content and follow-ups — just note that the audience is not duplicated.

💡 We’d love your feedback! Reach out via chat or email (contact@hunter.io) to share how A/B testing could help your workflow — your input goes directly to our Product team.

If your campaign shows no open rate, it’s because the emails were sent in plain text.

When an email doesn’t contain any formatting, it’s delivered as a plain-text message and open tracking isn’t enabled. Without tracking, opens can’t be measured — so it may look like nobody opened the email even if they did.

This is expected behavior and not a bug.

Plain-text emails can actually improve deliverability because they’re lighter, look more personal, and are less likely to trigger spam filters.

If you want to track opens in your next campaign, add some formatting (for example: links, bullets, or bold text). As soon as an email contains formatting, it becomes an HTML email and open tracking is enabled automatically.

Yes — you can change the default email sender in Campaigns.

To update it, open your Email Account Settings and click Edit next to the mailbox you want to set as the default.

In the mailbox settings, tick the checkbox to Make this the default sender.

Once saved, this mailbox will be automatically pre-selected when you create a new campaign.

Yes — you can send emails from an alias in Campaigns if you use Gmail or Google Workspace.

After connecting your email account in Email Account Settings, you can choose any of your Google aliases as the sender.

If you're on one of our All-in-one outreach plans, you can connect email accounts to send cold emails from within Campaigns.

The supported types of email providers are:

By default, you can connect the following number of email accounts based on the plan you're on:

It is also possible to add additional email accounts to your current plan without having to upgrade to a bigger plan. To learn more: How to add additional email accounts in Campaigns

You can buy additional email account connections for sending campaigns on any paid all-in-one outreach plan, by either adding more accounts to your current plan or upgrading your subscription.

Here's a breakdown of how many email accounts are included per plan and the price to include more:

👉 Full steps are covered here: How to add or upgrade email accounts in Hunter

Yes, if you don't have a Google or Microsoft account, you can connect your email account through SMTP/IMAP on all our paid all-in-one outreach plans.

To successfully connect your account with Hunter through an SMTP connection, check this step-by-step guide.

Hunter Campaigns supports both plain-text and formatted emails.

The editor automatically detects whether you’ve added formatting (bold text, links, lists, images) and sends the email accordingly.

👉 For full details, see: Text formatting in Campaigns

Yes — click tracking is available on all paid All-in-One Outreach plans.

When enabled, you’ll see which recipients clicked a link in your emails and how many times.

In the Emails tab of your campaign, you can view all recorded clicks. If your message contains multiple links, all clicks are tracked, but it’s not possible to identify which specific link was clicked.

Click tracking is enabled by default, but you can turn it off in the Settings tab before launching your campaign.

You can add images and GIFs to your campaign content if you’re on a paid plan; however, hyperlinking an image isn’t currenlty supported.

👉 Campaigns is designed to keep emails simple and natural, similar to messages sent manually from your inbox.

If adding links to images would be helpful for your workflow, feel free to share your feedback via chat or email at contact@hunter.io — it goes directly to our Product team.

Yes — you should always include an unsubscribe link in your campaign emails.

It helps you stay compliant (GDPR, CAN-SPAM), protects deliverability, and lets recipients opt out easily.

Hunter also detects unsubscribe replies automatically. If a recipient replies with phrases like “unsubscribe” or “remove me” in the first 100 characters, they’re instantly marked as Unsubscribed.

Once a contact is unsubscribed, Hunter automatically:

👉 Learn more about managing unsubscriptions

“Successful” is a manual status you can apply to a recipient when the goal of your outreach has been achieved.

It’s useful for marking positive outcomes—such as a conversion, a good reply, or a booked call—and for distinguishing them from “not interested” replies.

👉 Full guide: How to use the “Successful” status in Campaigns

You can filter your campaigns by team member or email account.

In the Campaigns section, use the Team members or Email accounts filters to display only the campaigns created by a specific user or sent from a specific connected mailbox.

This is a multi-select filter, so you can choose one or several team members at once.

👉 Full guide: How to filter your email campaigns

You can remove campaigns from your main Campaigns view using the same action menu. The option you see—Delete or Archive—depends on whether the campaign has been launched or not.

Both actions follow the same steps:

Sending statuses show the progress of your outreach for each recipient—whether an email was sent, opened, clicked, replied to, or if there were delivery issues.

You can view and filter these statuses in your campaign’s Emails and Audience tabs, as well as in the Leads section.

For the full list of statuses and what each one means, see the complete guide: Sending Statuses in Hunter Campaigns

Yes. Hunter automatically detects out-of-office or automatic replies in your campaigns.

When an automatic reply is received, Hunter:

You can view all tagged replies in your Inbox and choose to pause or resume follow-ups for those recipients.

💡 Learn more about Out-of-Office Detection