The spam folder problem

For most Mumbai businesses whose emails are landing in spam, the problem is technical specifically, missing domain authentication not content. Fix the technical layer first.

Fix 1: Set up domain authentication (SPF, DKIM, DMARC)

This is the most common and most impactful fix. Without these three DNS records, email servers cannot verify that your email is legitimately from your domain. Many treat it as a potential phishing attempt and route it to spam.

SPF (Sender Policy Framework): A DNS record that lists which servers are authorised to send email from your domain. Without it, anyone can spoof your domain. Setting it up: your email platform's documentation provides the specific SPF record to add in your domain's DNS settings.

DKIM (DomainKeys Identified Mail): A digital signature that proves each email was sent by an authorised server. Without it, email servers cannot verify the email was not tampered with in transit.

DMARC (Domain-based Message Authentication, Reporting & Conformance): A policy that tells email servers what to do if SPF or DKIM checks fail. Start with p=none (monitoring mode), then move to p=quarantine or p=reject as confidence grows.

How to check if you have these: Go to mxtoolbox.com and run the SPF Lookup, DKIM Lookup, and DMARC Lookup for your domain. Red or missing results indicate what needs to be fixed.

Fix 2: Improve your sender reputation

Your sending domain has a reputation score with major email providers. A new domain with no sending history has low reputation. A domain with a history of high bounce rates or spam complaints has damaged reputation.

Warm your domain: If your domain is new (under 6 months old) or has not been used for email recently, warm it gradually. Start with 20 30 emails per day to your most engaged contacts, increasing by 20% every 3 4 days over 4 6 weeks.

Remove hard bounces immediately: A bounce rate above 2% damages reputation quickly. Any email that hard bounces (the address does not exist) should be removed from your list permanently the same day.

Monitor spam complaint rate: Most email platforms show your spam complaint rate. Above 0.1% is a warning. Above 0.3% triggers deliverability restrictions with major providers.

Fix 3: Clean your list

Sending to a list with a significant percentage of invalid, inactive, or disengaged addresses is a deliverability killer even if your authentication is perfect.

Remove invalid addresses: Any email that generates a hard bounce is permanently invalid. Remove immediately and never send to it again.

Suppress disengaged subscribers: Subscribers who have not opened any email in 12 months are hurting your deliverability. Run a re-engagement campaign (see re-engagement campaigns for sleepy subscribers), then suppress non-responders.

Never send to purchased lists: A purchased list contains addresses who never opted in to receive email from you. They will mark it as spam. This is the fastest path to a damaged sender reputation.

Fix 4: Review your content

If authentication and list quality are fine but emails still land in spam, content triggers are the likely cause.

Avoid spam trigger words in subject lines: "Free," "guaranteed," "act now," "limited time," excessive exclamation marks, and all-caps words all increase spam filter scores.

Maintain a healthy image-to-text ratio: Emails that are mostly images (a single large image with minimal text) are flagged by spam filters that cannot read image content.

Include a physical address: CAN-SPAM and similar laws require a physical address in commercial emails. Most spam filters check for this.

Test before sending: Use tools like Mail-Tester.com or GlockApps to test your email against spam filters before sending. They give you a deliverability score and flag specific issues.

Frequently asked questions

How long does it take to recover sender reputation after a spam problem? With consistent clean sending practice, reputation typically recovers over 4 8 weeks. There is no instant fix reputation is built through sustained good behaviour.

If I switch email platforms, does my sender reputation follow? Your domain reputation persists. Your IP reputation (the specific sending server) resets. Switching platforms may actually help if your current platform's IP has a poor reputation, but you still need to warm your domain on the new platform.

Can I check whether Gmail is accepting my emails? Google Postmaster Tools (postmaster.google.com) provides domain and IP reputation data specifically for Gmail delivery. Sign up and verify your domain to see your reputation score and delivery rates.