Help ensure your emails
hit the inbox
Stop guessing why your messages end up in spam. Follow this 26-point checklist to achieve technical compliance, enhanced sender reputation, and delivery success.
One Email Per Recipient
When sending to a mailing list, each recipient should receive their own individual email. Do not send single messages with a large number of recipients on the 'To:', 'Cc:', or... [more]
Avoid 'No Reply' Addresses
Using a no-reply@ sender address can reduce email success and harm your reputation. Weaker Deliverability — Positive engagement helps maintain sender reputation. A no-reply address prevents this interaction and may... [more]
ESP
The use of a dedicated Email Service Provider (ESP) is strongly recommended in preference to transmitting directly from a local internet-connected server. ESPs typically ensure compliance with DNS, IP reputation,... [more]
Send Consistently
Mailbox providers generally favor consistent traffic patterns over irregular, high-volume bursts. Concentrating transmission activity into one or two days per month may trigger anomaly detection systems, which can interpret such... [more]
Avoid Domain-Based Sorting
With mailing lists, avoid sorting or batching recipients by email domain (for example, grouping all @gmail.com or @yahoo.com addresses together). Sending large numbers of messages to the same mailbox provider... [more]
Safe Sender
To help recipients recognize your messages, always send from the same domain they originally signed up with. Consistency builds trust and reduces the chance of your emails being mistaken for... [more]
Out of Control
It is important to recognize that recipients and their Internet Service Providers (ISPs) may implement proprietary filtering criteria. Certain systems may classify any message not explicitly whitelisted by the recipient... [more]