Email Deliverability Best Practices for Mental Health Providers
You can craft the most compelling email newsletter in the mental health space, but none of it matters if your emails land in spam folders. Email deliverability — the percentage of your emails that actually reach recipients’ inboxes — is a technical and strategic challenge that many therapy practices overlook. With inbox providers like Gmail and Outlook tightening their filtering in 2026, deliverability has never been more important.
Understanding Why Emails Go to Spam
Spam filters evaluate dozens of signals to determine whether an email belongs in the inbox or the junk folder. Sender reputation is the most important factor — it is a score based on your sending history, including bounce rates, spam complaint rates, and engagement levels. High bounce rates (from sending to invalid addresses) and spam complaints (from recipients marking your emails as spam) damage your sender reputation significantly. Other signals include the technical configuration of your sending domain, the content of your emails (certain words and patterns trigger filters), and whether recipients actually open and engage with your messages. A single factor rarely causes deliverability issues — it is usually a combination of problems that degrades inbox placement over time.
Technical Setup: Authentication Protocols
Three email authentication protocols are now essential for deliverability. SPF (Sender Policy Framework) tells inbox providers which servers are authorized to send emails on behalf of your domain. DKIM (DomainKeys Identified Mail) adds a cryptographic signature to your emails proving they have not been tampered with in transit. DMARC (Domain-based Message Authentication, Reporting, and Conformance) tells inbox providers what to do with emails that fail SPF or DKIM checks. If you use a custom domain for your email marketing (and you should — sending from a Gmail or Yahoo address hurts deliverability), ask your hosting provider or email platform to help you configure all three protocols. Most email marketing platforms provide step-by-step instructions for adding these DNS records.
List Hygiene and Subscriber Management
A clean email list is the foundation of good deliverability. Remove bounced addresses immediately — continuing to send to addresses that bounce signals to inbox providers that you do not maintain your list. Re-engage or remove subscribers who have not opened an email in six months. While it feels counterintuitive to shrink your list, inactive subscribers hurt your open rates and sender reputation without providing any benefit. Use double opt-in for new subscribers to ensure addresses are valid and that recipients genuinely want your emails. Regularly audit your list for role-based addresses (info@, admin@), disposable email addresses, and obvious typos. A list of 500 engaged subscribers outperforms a list of 5,000 disengaged ones in every metric that matters.
Content Practices That Improve Deliverability
How you write your emails directly affects deliverability. Avoid spam trigger words in subject lines — terms like “free,” “guarantee,” “act now,” and excessive capitalization or exclamation points trigger filters. Keep your text-to-image ratio balanced — emails that are mostly images with little text raise red flags. Include a plain-text version of every HTML email. Personalize subject lines and content with the subscriber’s name to improve engagement rates. Write subject lines that accurately reflect the email’s content — misleading subjects generate spam complaints. Keep emails concise and focused on one primary topic or call to action rather than cramming multiple messages into a single send. For tips on crafting effective email content, explore our email copywriting guide.
Sending Frequency and Timing
Consistency matters more than frequency for deliverability. Sending one email per week at the same time is better for your sender reputation than sending three emails one week and none the next. If you currently send monthly newsletters, do not suddenly switch to daily emails — gradual increases in volume prevent spam filters from flagging the change as suspicious. For most therapy practices, a weekly or biweekly newsletter provides enough frequency to stay top-of-mind without overwhelming subscribers. Use your email platform’s analytics to identify when your audience is most likely to open emails, and schedule your sends for those windows consistently.
Monitoring and Maintaining Deliverability
Track your deliverability metrics monthly. Your open rate should be at least 20% — below that suggests deliverability problems. Your bounce rate should stay below 2%. Your spam complaint rate should be under 0.1%. If any of these metrics trend in the wrong direction, investigate immediately rather than waiting for a crisis. Use tools like Google Postmaster Tools to monitor your domain’s sender reputation with Gmail specifically. Most email marketing platforms also provide deliverability reports and recommendations. Treat deliverability as an ongoing practice, not a one-time setup task — the rules change, inbox providers update their algorithms, and maintaining strong deliverability requires consistent attention.
