Gmail Account Selection & Domain Configuration
Personal Gmail (@gmail.com): Free, 500 emails/day limit, lower reputation, suitable for small-scale testing. Google Workspace (custom domain): $6-18/user/month, 2000 emails/day, higher deliverability, supports SPF/DKIM/DMARC - strongly recommended for email marketing. Gmail API + SMTP: For high-volume sending with SendGrid/Mailgun. Domain best practices: Use separate marketing domain, buy aged domains (>1 year), clean history, configure custom addresses (hello@, support@), avoid noreply@.
SPF/DKIM/DMARC Email Authentication Setup
Email authentication proves emails are from your domain, prevents spoofing, improves deliverability. SPF: Add DNS TXT record `v=spf1 include:_spf.google.com ~all` listing authorized servers. DKIM: Google Workspace generates key automatically; go to Admin → Apps → Google Workspace → Gmail → Authenticate email, generate and add DNS record. DMARC: `v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com` - tells servers how to handle authentication failures. Verify at mxtoolbox.com/spf.aspx, dkimvalidator.com, mail-tester.com (target 9-10 score).
10 Core Tips to Avoid Spam Folder
1) Domain warm-up: Start 10-20/day week 1, 50-100 week 2, 200-500 week 3, then scale. 2) Content quality: Avoid spam words (Free, Click here, Buy now), 60% text + 40% images ratio. 3) Subject optimization: 30-50 chars, personalize with {{name}}, create curiosity. 4) Double opt-in: Require email confirmation before adding to list. 5) List hygiene: Remove 6-month inactives and bounces regularly. 6) Send timing: B2B Tue-Thu 10-11am, B2C weekends 7-9pm. 7) Include unsubscribe link (CAN-SPAM compliance). 8) Monitor metrics: >20% open rate, >2% CTR, <0.5% unsubscribe, <0.1% complaint. 9) Include plain text version alongside HTML. 10) Encourage engagement: Ask users to reply, forward, mark as not spam to build domain reputation.
High-Converting Email Copy Structure (AIDA Model)
A (Attention): Subject line + preview text (first 50 chars) determines open rates. Examples: "{{name}}, you missed this...", "24 hours left: Exclusive offer", "3 methods to double your revenue". I (Interest): First 1-2 paragraphs explain value. Point to pain points, show benefits with data. D (Desire): Prove benefits with case studies, data, testimonials. Social proof: "10,000+ users chose us". Scarcity: "Only 50 spots left". A (Action): Clear CTA button: "Start Free Trial", "Get My Discount", "View Full Guide". Best practices: Personalize with {{name}} variables, keep 200-500 words, mobile-optimize (single column), visual hierarchy (headings, 16px+ font, highlighted key points, contrast CTA), one goal per email.
Email Automation & A/B Testing
Welcome Series (4 emails over 7 days, 40-50% open rates): Day 0 welcome, Day 1 product guide, Day 3 case studies, Day 7 special offer. Abandoned Cart (3 emails, 15-20% conversion): 1hr reminder, 24hr 10% discount, 48hr final chance. Re-engagement: "We miss you" + exclusive return offer for 3-6 month inactives, remove if still no response. Behavior-triggered emails based on page views, downloads, video watches. A/B test one variable at a time with 1000+ recipients per variant. Tools: Mailchimp, SendGrid, ActiveCampaign, ConvertKit, HubSpot.