Email Deliverability for Agencies: SPF, DKIM, DMARC & Warm-Up

Outbound campaigns only work if your emails reach the inbox.

If your messages land in the spam folder, your copy, offer, and list building do not matter. The prospect will never see your message.

To maintain high deliverability, you must configure your domain's technical records and warm up your inbox before launching campaigns. Here is the step-by-step deliverability checklist.

1. Configure DNS Authentication Records Email providers (like Gmail and Outlook) check your domain records to verify that you are a legitimate sender:

**SPF (Sender Policy Framework)**: Lists the IP addresses authorized to send mail from your domain.
**DKIM (DomainKeys Identified Mail)**: Adds a digital signature to your messages, verifying that they were not tampered with in transit.
**DMARC (Domain-based Message Authentication, Reporting, and Conformance)**: Tells the receiving server what to do if the SPF or DKIM checks fail (e.g., block the mail or send it to spam).

2. Separate Your Sending Domains Never run cold outreach from your primary business domain.

If your company site is `apexagency.com`, register variations like `apexagencygrowth.com` or `apexdesign.com`. If these secondary domains damage their reputation, your main business communication remains safe.

3. Warm Up Your Domains New domains have a baseline sending limit. If you register a domain and immediately send 200 emails per day, Google will flag it as spam.

Instead, warm up your accounts: 1. **Use warm-up systems**: Connect your domains to automated networks that simulate real conversations. 2. **Scale slowly**: Start by sending 5 emails per day, and increase the volume gradually over 3-4 weeks. 3. **Maintain high replies**: Ensure a portion of your warm-up emails receive replies, which signals to Gmail that you are a trusted sender.

4. Limit Daily Sending Volume Keep sending volumes low to maintain clean sender scores: * Limit daily sending to 30-40 emails per inbox. * If you need to send 200 emails per day, use 5-6 separate domains rather than sending everything from one account.

By following this deliverability checklist, you can keep your emails in the primary inbox.

Ready to secure high-performance outbound delivery? [Book a Call](/apply/) to configure your email infrastructure.

Email Deliverability for Agencies: SPF, DKIM, DMARC & Warm-Up

1. Configure DNS Authentication Records Email providers (like Gmail and Outlook) check your domain records to verify that you are a legitimate sender:

2. Separate Your Sending Domains Never run cold outreach from your primary business domain.

3. Warm Up Your Domains New domains have a baseline sending limit. If you register a domain and immediately send 200 emails per day, Google will flag it as spam.

4. Limit Daily Sending Volume Keep sending volumes low to maintain clean sender scores: * Limit daily sending to **30-40 emails per inbox**. * If you need to send 200 emails per day, use **5-6 separate domains** rather than sending everything from one account.

Ready for a pipeline you can actually forecast?

4. Limit Daily Sending Volume Keep sending volumes low to maintain clean sender scores: * Limit daily sending to 30-40 emails per inbox. * If you need to send 200 emails per day, use 5-6 separate domains rather than sending everything from one account.