Help center › Sending and delivery
Get your mail delivered, not junked
Practical steps that keep your messages out of spam.
Delivery to the inbox depends mostly on your domain's reputation and on doing the basics right. These are the things that matter.
1. Authenticate your domain
SPF, DKIM and DMARC must all show OK on your domain page. Gmail, Yahoo and Outlook increasingly reject or junk mail without them. Details: DNS records explained.
2. Start slowly
A brand-new domain has no reputation. For its first 7 days after verification, JK Mails allows up to 100 emails a day per domain (or your plan limit if that is lower). Use that time to send normal, wanted mail to real people, replies and conversations, not a big first campaign. Volume then rises to your plan limit automatically.
3. Send only wanted mail
- Never buy or scrape lists. Mail to people who did not ask for it gets reported as spam, and that damages your domain quickly.
- If you send newsletters or marketing mail, include a visible unsubscribe link and honour it at once. Large senders to Gmail and Yahoo (thousands of messages a day) must also support one-click unsubscribe and keep complaints very low.
- Remove addresses that bounce. Repeatedly mailing addresses that do not exist is the fastest way to be slowed down.
4. Make messages look legitimate
- Use a real "From" name and a consistent address.
- Avoid all-capitals, many exclamation marks, URL shorteners and image-only messages.
- Include a plain text part or at least real text, not only a picture.
5. Test and monitor
Send a message to a free test address on a deliverability checker website and read the report. Watch for bounce messages (see Troubleshooting). If many of your messages are slowed or refused, our system may lower your sending limit automatically, see Sending limits.
If a receiver blocks you
Open a support request and include the full bounce message (the text from the server, not only "undelivered"). We can check blocklists and contact the receiver if the problem is on our side.