FAQ – Email Warm-up

1. Why should I warm up email accounts?

Email Warm-up automatically creates a positive email history for your account to improve its sender reputation. The better your sender reputation, the more likely your emails are to land in the Inbox instead of spam.

2. How does warm-up work? Why am I receiving unexpected emails in my inbox?

When you enable Email Warm-up, your mailbox joins Snov.io’s deliverability network as a recipient address. This network includes real accounts: our managed mailboxes and other users' accounts that are currently in warm-up.

As part of this process, your account automatically sends and receives warm-up emails that simulate real email communication. It may also receive test messages from Deliverability Checks run by other users.

Recipient addresses for these tests are selected randomly among the ones who never participated before. This ensures each test uses unique recipients for more accurate results, including when you run your own checks.

3. How do I know which emails in my inbox are related to warm-up and deliverability checks?

These automated emails have tags in their subject line, or a snovio label added to them, so they’re easy to identify in your inbox.

For example, a [SNOV] tag for Email Warm-up, or a (SNOV) tag for Deliverability Check.

Please note that the tag used may change over time to avoid repetitiveness detected by spam filters. Don't mark these emails as spam or report them to your email provider. They are part of your email warm-up and deliverability testing.

4. What email accounts can I warm up? What providers are supported?

You can warm up any email account in Snov.io and the warm-up effect is guaranteed. It works with any email provider, including popular services or specialized SMTP hosts. You can also run a targeted warm-up to raise your reputation with specific providers you select.

To start a warm-up, connect your account to Snov.io.

5. Which Snov.io plan includes warm-up?

Email Warm-up is included in every Snov.io plan. You can try it even on the free plan.

6. How many email accounts can I warm up?

Every plan includes warm-up slots. The number of warm-up slots means how many email accounts you can warm up at the same time.

On Pro plans, you can warm up an unlimited number of accounts simultaneously. Higher-tier plans also offer higher warm-up limits per account.

During warm-up, your email accounts can send a certain number of emails per day based on your plan limits.

7. I want unlimited warm-up slots and a Pro plan, but I also want to keep costs low. Any tips?

Unlimited slots in Email Warm-up are available starting from the Pro 5K plan. To save on your plan costs, consider switching to annual billing — you’ll get all the same features, but at 25% less than paying monthly.

8. Can I send email campaigns and warm-up accounts at the same time?

The best practice is to warm up accounts before launching campaigns or pause your campaigns while completing the warm-up period. This will ensure optimal warm-up results and improved deliverability for your campaigns when you start them.

The warm-up’s duration depends on your email account’s current condition:

• at least 4 weeks for newly created mailboxes;
• at least 2 weeks for older accounts with some sending history.

When your campaigns are active, keep the warm-up running but lower its daily limit to 10-20 emails. This helps maintain your sender reputation and ensures you don’t exceed your provider's daily limit.

It's also a good practice to have a few warmed-up mailboxes as backups in case one of your accounts faces deliverability issues. This allows you to switch senders in active campaigns while restoring the reputation of the affected mailbox.

Read more about the best warm-up settings.

9. Can I use the same schedule for email campaigns and a warm-up?

Yes, it's even better to set a warm-up schedule that matches your usual campaign sending times. This keeps your account within its regular activity timeframe.

10. Do emails sent from the email account during warm-up count towards the daily sending limit?

Warm-up emails are not included in the daily limit (Messages per day) in your email account settings. However, they count toward your email provider's limits for your account.

11. Can I limit the number of emails I receive from other users during warm-up?

The number of emails received is determined by a Reply rate set in the warm-up settings. This means the percentage of your emails that will receive replies by the end of the warm-up process.

12. Who does the warm-up send emails to?

Warm-up emails are sent only to inboxes inside our warm-up network (not to your leads or contacts). The network includes real inboxes and our managed mailboxes. These inboxes automatically send, receive, open, and reply to warm-up emails to create positive engagement signals for your account.

During the warm-up campaign, your email account automatically sends and receives these warm-up messages, helping improve your sender reputation and deliverability.