Why is my business email going to spam?
When your quotes, invoices and replies land in a customer’s spam folder, it costs you business without anyone telling you. The cause is almost always one of ten things below — and most of them take minutes to fix.
Updated 26 October 2026.
First, find out what the receiver thinks
- Send a short, normal message from your business address to a Gmail address you own (and to an Outlook.com address, if you can).
- In Gmail, open it and choose ⋮ → Show original. Look at the three lines at the top: SPF, DKIM and DMARC.
- All three should say PASS. If any says FAIL or is missing, start with fixes 1–3. If all pass, go on to fix 4.
The ten common causes, and the fix for each
- No SPF record, or two of them. Publish exactly one SPF record that includes every service sending as your domain. Two records make SPF fail entirely. See SPF, DKIM and DMARC explained.
- No DKIM signature. Your provider must sign your mail, and the public key must be in DNS under the selector it gives you. A copy-paste error in the long key is the usual problem.
- No DMARC record. Gmail and Yahoo expect one from bulk senders, and it helps everyone else. Start with
v=DMARC1; p=none; rua=mailto:postmaster@yourdomain. - A forwarding address in the middle. Mail you forward from one address to another can fail SPF at the final stop. DKIM survives forwarding, which is one more reason it matters.
- Your provider’s servers have a poor reputation. On cheap shared hosting, your mail leaves from the same server as hundreds of other sites, and one spammer among them can get the server blocklisted. Check your sending address’s server on a blocklist checker; if it is listed, move to a provider that watches its reputation.
- A brand-new domain. Receivers trust history. For the first few weeks, send ordinary, personal mail at a steady pace and avoid sending to long lists.
- Content that looks like spam. All capitals, “URGENT”, many exclamation marks, a single large image with little text, or a message that is only a link. Write the way you would to a colleague.
- Risky links and attachments. Link shorteners, links whose text shows one address while pointing to another, and attachments like .exe, .js or password-protected archives are treated as dangerous. Link to your own domain and send documents as PDF.
- Bulk mail from your everyday mailbox. Sending the same message to hundreds of people, especially without an unsubscribe link, damages the reputation your normal mail depends on. Use a newsletter service for that.
- People marked you as spam. Every “report spam” click counts against you. Only write to people who expect to hear from you, and make it easy to stop.
What Gmail, Yahoo and Outlook require now
Since 2024 the largest mailbox providers have published firm rules for senders. In short:
| Requirement | Everyone | Bulk senders (thousands a day) |
|---|---|---|
| SPF or DKIM passes | Required | Both required |
| DMARC record | Recommended | Required (p=none is enough) |
| “From” domain aligned with SPF or DKIM | Recommended | Required |
| One-click unsubscribe | — | Required for marketing mail |
| Low spam complaint rate | Expected | Kept well below 0.3% |
Summarised from Google’s and Yahoo’s published sender guidelines; check their pages for the current wording. Microsoft has announced similar requirements for Outlook.com.
How GINbox keeps your mail out of spam
- SPF, DKIM and DMARC are set up for every domain, and the admin panel shows each record as found or missing.
- Every outgoing message is checked for spam and viruses before it leaves, so one careless or hacked mailbox cannot damage everyone’s reputation.
- Sending limits per mailbox stop a stolen password from turning into a spam run — and the mailbox owner is told.
- Our sending reputation is watched around the clock; if a receiver has trouble with us, mail to it goes out by a backup route automatically.
Questions people ask
Why do my emails go to spam in Gmail but not elsewhere?
Each provider filters differently. Gmail weighs authentication (SPF, DKIM, DMARC) and how its own users treat your mail heavily. Open the message in Gmail, choose Show original, and check that SPF, DKIM and DMARC all say PASS; then look at content and links.
Will asking people to mark my mail as “not spam” help?
Yes, for those people and a little for your reputation: Gmail and Outlook learn from what their users do. Ask regular contacts to add your address to their contacts. It does not replace fixing the cause.
Does a new domain go to spam more often?
Often, yes. A domain registered recently has no history, and receivers are careful with it. Send normal, personal mail at a steady pace for the first weeks, avoid bulk sends, and make sure SPF, DKIM and DMARC pass from day one.
Can I send newsletters from my business mailbox?
Small, personal updates to people who know you are fine. Bulk newsletters should go through a newsletter service with unsubscribe links and its own sending reputation; sending them from your everyday mailbox puts your normal business mail at risk.
How does GINbox keep my mail out of spam?
Every domain is set up with SPF, DKIM and DMARC, outgoing mail is checked for spam and viruses before it leaves, sending limits stop one compromised mailbox hurting everyone, and our sending reputation is watched around the clock with a backup route if a receiver has trouble with us.
Try it on your own domain
Set up a real mailbox at your own domain, with every record checked for you. No card needed.