Deliverability
Why an email reaches the inbox — or ends up in spam.
Deliverability is the ability of your emails to reach the inbox — not the spam folder. It is the single most important factor in email marketing: a beautiful campaign that ends up in spam simply does not exist.
What Gmail, Outlook and others check
When your email arrives, the recipient's mail provider asks three questions:
- Who is sending? It verifies the technical authentication of the domain: SPF, DKIM and DMARC. An unauthenticated domain is suspect by default. Since 2024, Gmail and Yahoo require these records for bulk senders.
- What is the sender's reputation? The history of the sending domain and IP address: complaint rate ("mark as spam"), bounce rate (non-existent addresses), sending consistency.
- Do recipients want this? Engagement signals: opens, clicks, replies, messages moved to trash without reading.
What Mailcheer does for you
- The domain verification wizard sets up complete authentication: DKIM, SPF on the technical sending domain, and recommended DMARC.
- A sender can only exist on a verified domain — sending unauthenticated is impossible.
- The suppression list guarantees that an unsubscribed contact is never contacted again, even if accidentally re-imported. Re-contacting unsubscribed users is one of the top causes of complaints.
- The CSV import requires your confirmation that contacts have given consent.
- An address that bounces, or whose recipient complains, goes on the suppression list automatically.
What depends on you
- Only import contacts who have genuinely given consent. A purchased or scraped list destroys your reputation within a few sends.
- Keep your list clean: the more engaged your audience, the better your reputation.
- Send consistently, rather than large sudden volumes after months of silence.
Check where you stand
Mailcheer's free public domain tester reads your SPF, DKIM and DMARC records in seconds — no account required.