Why Your Firm’s Emails Are Landing in Spam

You send a proposal to a client, you wait, and then they tell you it was sitting in their spam folder the whole time. This is one of the most quietly damaging tech problems a firm can have — and the fix is a one-time setup most firms have never done.

Your important email, the one that wins work, was sitting in a junk folder. Or worse, it bounced and you never knew. This is one of the most quietly damaging tech problems a firm can have, because it costs you work and you cannot even see it happening.

Here is the short version. Your firm’s emails land in spam most often because your domain is missing three behind-the-scenes records that prove your email is really from you: SPF, DKIM, and DMARC. Without them, email providers like Gmail and Yahoo treat your messages as suspicious. Setting up these three records is a one-time fix that gets your real emails delivered and stops scammers from faking your address.

Why good email lands in the junk folder

You are not a spammer. You are sending a normal proposal to a normal client. So why does Gmail treat you like junk mail? Email was built decades ago with almost no way to prove who really sent a message. Anyone can put your name and address on an email, the same way anyone can write any return address on a paper envelope. Spammers and scammers abuse this constantly.

So email providers got strict. Gmail, Yahoo, and others now look for proof that an email is really from the domain it claims to come from. If your firm has not set up that proof, your real email looks exactly like a fake one. The filter cannot tell the difference, so it plays it safe and drops you in spam.

It is not that your email is bad. It is that you never showed your ID at the door.

The three records that prove it is really you

The proof comes in three parts. All three live in your domain’s DNS settings — the internet’s address book for your domain. Here is each one in plain English.

• SPF — a list of who is allowed to send email using your firm’s name. You tell the internet which mail servers are authorized. Anything else claiming to be you looks fake.
• DKIM — a tamper-proof seal. Each email you send gets a hidden digital stamp that proves the message really came from you and was not changed along the way.
• DMARC — the instruction sheet. It tells receiving email systems what to do when a message claiming to be from you fails the first two checks: let it through, send it to spam, or reject it outright. It also sends you reports on who is sending email in your name.

Together, SPF, DKIM, and DMARC are how your firm proves its identity to the rest of the email world. Set them up and your real email gets trusted. Skip them and you look like a stranger.

The rules got stricter, and it is not optional anymore

This used to be a “nice to have.” It is not anymore, and that change caught a lot of firms off guard. In early 2024, Gmail and Yahoo started requiring these records. By late 2025, Gmail tightened the screws further, and email that fails these checks can be rejected outright, not just filtered to spam.

So the bar moved. Email that would have squeaked through a few years ago now lands in junk or bounces. If your firm’s delivery has gotten worse and you cannot figure out why, this is very often the reason.

How to tell if this is your problem

A few signs point right at missing email records. Clients and consultants say they never got your email, or they keep finding your messages in spam. Your emails to Gmail and Yahoo addresses seem to vanish. You get bounce-backs saying the message was rejected. Or someone tells you they got a weird email “from you” that you never sent — which means scammers are already spoofing your address because nothing is stopping them. If any of that sounds familiar, the fix below is almost certainly what you need.

The fix: set up all three, the right way

This is a one-time setup. The work happens in your domain’s DNS settings. You add an SPF record listing who can send for you, turn on DKIM so your mail gets the tamper-proof seal, and add a DMARC record telling receivers what to do with fakes. If your firm uses Microsoft 365 or Google Workspace, both have clear, supported ways to set all three up for your domain.

A few honest cautions. SPF has to list every service that legitimately sends email as your firm — your main email, plus things like your proposal software, newsletter tool, or accounting system. Miss one and that service’s mail can start failing. And DMARC should be rolled out in stages, starting in a “just watch and report” mode, so you can confirm your real email passes before you tell the world to reject anything that fails. Done carelessly, a DMARC record can block your own email. Done right, it protects you.

This is the kind of setup that is simple for someone who does it often and fiddly for someone doing it once. It is worth getting right, because a mistake here can stop your email instead of fixing it.

The bonus: this also stops people faking your firm

These same records do not just get your real email delivered. They also stop scammers from sending fake emails in your name. If a scammer tries to email your client a fake invoice that looks like it came from your firm asking them to wire money to a new account, DMARC set to reject checks the message, sees it is not really from you, and blocks it. Without DMARC, it sails right through wearing your name.

So this is both a delivery fix and a security win. It protects your reputation and helps shield your clients from the exact wire-fraud scams we cover in our post on the phishing emails targeting AEC firms. One setup, two real benefits.

Frequently asked questions

We will get your email delivered (and trusted)

Email that lands in spam is lost work you never see, and a domain that anyone can fake is a security hole. Both are fixed by the same one-time setup, done correctly. We help small architecture and engineering firms around Knoxville get SPF, DKIM, and DMARC in place the right way, so your proposals reach clients and scammers cannot wear your name.

If your emails keep landing in junk, or you just want to make sure they will not, give us a call. We will check your domain, set up the records correctly, and confirm your real email gets through.

Sources: New Email Sender Requirements for DMARC, SPF, DKIM (Valimail); Google and Yahoo New Email Authentication Requirements (Proofpoint); Updated Email Authentication Requirements 2025 (Security Boulevard).