You wrote a good email, sent it to a list of real businesses, and heard nothing. Then a friend on your list mentions it landed in their spam folder. Now you are wondering whether the last few weeks of outreach were seen by anyone at all.
Spam placement is rarely caused by one thing. Mailbox providers look at who you are, how your domain behaves, who you send to and what your email looks like. The good news is that most causes are fixable, and you can check them in an afternoon.
Step 1: Confirm you actually have a spam problem
Before changing everything, test it.
- Send your campaign email to a few personal addresses on different providers (for example a Gmail and an Outlook address you own).
- Check where it lands: inbox, promotions or spam.
- Look at your bounce messages. A spike in bounces often comes before spam placement.
- Compare open activity across steps. A sudden drop with no change in your copy is a warning sign, though opens are an imperfect signal because some mail apps load images automatically or block them.
If your test emails land in spam, work through the steps below in order. The first ones matter most.
Step 2: Fix your domain authentication
Mailbox providers want proof that you are allowed to send from your domain. Without it, your email looks like it could be forged. Three DNS records handle this:
- SPF lists the servers allowed to send for your domain. If you send through Google Workspace, your SPF record must include Google.
- DKIM adds a signature to each email proving it was not altered. Turn it on in your email provider's admin settings and add the record they give you.
- DMARC tells receivers what to do when SPF or DKIM fail. Start with a monitoring policy (p=none) and tighten it later.
Google and Yahoo have published sender requirements that include authentication, and bulk senders face stricter rules. Check the current requirements for the providers your prospects use, since they change.
You can check your records with any free DNS lookup tool. If one is missing, add it today. It is the single most common cause of cold email going to spam that you can fix in minutes.
Step 3: Stop sending to bad addresses
Every bounce tells the receiving server that you do not know who you are emailing. Too many bounces and your domain starts to look like a spammer's.
Common sources of bad addresses:
- Old lists bought or downloaded months ago
- Guessed addresses like info@ on domains that no longer exist
- Typos from manual copying
Run every list through email verification before you send, not after. In GetClient you can verify a list right where your leads are saved, then launch the campaign from the same place, so a cleaned list never has to be exported and re-imported. A rule of thumb many senders use: if a list bounces noticeably on the first send, pause and clean it before continuing.
Step 4: Slow down your sending
A brand new domain that suddenly sends hundreds of emails a day looks suspicious. So does a sudden jump from 20 a day to 300.
- Use a separate sending domain (for example a close variation of your main one) so your primary domain is protected if something goes wrong.
- Warm up new accounts by sending a small number of real emails first and increasing slowly over a few weeks.
- Spread volume across several accounts instead of pushing one inbox hard.
- Send on a schedule during business hours rather than in one burst.
There is no official safe number. As a conservative rule of thumb, many people keep a new inbox to a few dozen cold emails a day and increase only when replies and bounces look healthy. GetClient lets you connect several Gmail or SMTP accounts and set send-day limits by weekday, which makes pacing easier to stick to.
Step 5: Clean up the email itself
Content is rarely the only problem, but it can tip a borderline email into spam.
Keep it plain
Cold emails that look like newsletters, with heavy images, banners and many links, resemble marketing blasts. A plain text style layout reads like a person wrote it.
Limit links
Use one link at most, and consider none in the first email. Avoid link shorteners, which are often abused by spammers. Pairing this with one call to action per email helps both deliverability and replies.
Skip spammy patterns
- ALL CAPS subject lines
- Lots of exclamation marks
- Pushy phrases like "act now" or "guaranteed"
- Attachments in a first message
Make each email different
Identical emails sent to hundreds of people are easy to fingerprint. Use merge tags so each one is specific: the business name with {{params.name}}, the city with {{params.city}}, the category with {{params.category}}. A personalized opening line is even better. Our guide to subject line personalization has ideas that do not feel forced.
Step 6: Make it easy to opt out
When people cannot easily stop your emails, they click "Report spam" instead. Those reports hurt your reputation more than an unsubscribe ever will.
Add a clear unsubscribe option and honor it. Depending on where you and your recipients are, laws such as CAN-SPAM in the US, GDPR in the EU or CASL in Canada may require an opt-out, a real sender identity and a physical address. Check the rules that apply to you; this is not legal advice. GetClient campaigns include a one-click unsubscribe link with a signed URL per recipient, and unsubscribed addresses are skipped automatically.
Step 7: Earn replies, because replies help
Providers notice when people engage with your email. Replies are a strong positive signal. Emails that are relevant to the person get replies, which in turn help future emails land.
- Target tightly. A message for local cleaning services should talk about their real problems, not a generic pitch.
- Ask a simple question that is easy to answer.
- Keep follow-ups short and spaced out. A sequence of three or four steps over a couple of weeks is gentler than daily nudges. See how to build a drip campaign for a structure that does not overwhelm people.
Your fix-it checklist for today
- Send a test to your own addresses and note where it lands.
- Check SPF, DKIM and DMARC and add anything missing.
- Verify your list and remove invalid addresses.
- Lower daily volume per account and spread sending out.
- Strip extra links, images and spammy wording.
- Personalize with merge tags and a real opening line.
- Add a working unsubscribe link.
Work through these and test again in a few days. If you want to find leads, verify them and send from one place, you can start with free credits; see plans and credits.