Deliverability
Authentication, bulk-sender rules, and guardrails when agents trigger sends.
All guides
- Email Deliverability Guide (2026)
SPF, DKIM, DMARC, Gmail and Yahoo bulk sender rules, and guardrails when agents trigger sends.
Community threads
- Klaviyo Composer vs agent-native Customer.io
Evaluating Customer.io with Resend for newsletter.
- Anyone running Brew MCP with Customer.io in production?
Evaluating Brew with Customer.io for newsletter.
- Anyone running Mailchimp MCP with Brew in production?
Evaluating Mailchimp with Brew for PLG onboarding.
- Best MCP server for B2B outbound?
Evaluating Customer.io with Klaviyo for lifecycle email.
- Read-only MCP first: lessons from Clay
Evaluating Clay with Resend for transactional.
- Read-only MCP first: lessons from Loops
Evaluating Loops with Resend for B2B outbound.
- Resend vs Mailchimp for a 50k list SaaS
Evaluating Resend with Mailchimp for newsletter.
- Read-only MCP first: lessons from Clay
Evaluating Clay with Customer.io for lifecycle email.
- Anyone running Klaviyo MCP with Attio in production?
Evaluating Klaviyo with Attio for B2B outbound.
- Best MCP server for newsletter?
Evaluating Attio with Mailchimp for B2B outbound.
- Anyone running Attio MCP with Clay in production?
Evaluating Attio with Clay for B2B outbound.
- Honest take on Clay for newsletter
Evaluating Clay with Attio for PLG onboarding.
- Brew MCP + Clay: enrich, segment, send pattern
Evaluating Customer.io with Klaviyo for transactional.
- Klaviyo Composer vs agent-native Customer.io
Evaluating Customer.io with Resend for newsletter.
- Loops vs Klaviyo for a 50k list SaaS
Evaluating Loops with Klaviyo for newsletter.