Deliverability best practices

Reaching the inbox depends on authentication, on how you collect contacts, and on how people react to your email. MailHoor handles the first; these practices handle the rest.

Last updated: 2026-10-13

The rules Gmail, Yahoo and Outlook enforce#

Bulk senders must:

1. Authenticate with SPF and DKIM, and publish a DMARC record.
2. Send from a domain aligned with the From address.
3. Include one-click unsubscribe and honour it quickly.
4. Keep spam complaints below 0.3%, and ideally under 0.1%.

MailHoor sets up authentication with you, adds a one-click unsubscribe header to every campaign, and removes unsubscribed contacts automatically.

Collect contacts the right way#

• Use signup forms and turn on double opt-in for new subscribers.
• Never buy, rent or scrape lists.
• Say clearly what people will receive and how often.

Keep your list clean#

• MailHoor removes hard bounces, complaints and unsubscribes from future sends automatically.
• Import checks remove disposable addresses and domains that cannot receive email.
• Re-engage or remove contacts who have not opened or clicked for months. The Inactive segment finds them.

Build up volume gradually#

If your domain is new to sending, start with your most engaged contacts and increase volume over a few weeks. MailHoor sends on warmed-up IPs with gradual warm-up, but your domain also builds its own reputation.

Write emails people want#

• A clear subject line that matches the content.
• A real From name and an address people can reply to.
• A visible unsubscribe link, a balance of text and images, and links to your own domain.

Watch your numbers#

Open Reports → Deliverability to follow bounces and complaints. If complaints rise, slow down, check where the contacts came from, and send only to engaged segments until the rate drops.