dkim

Sender Identity

Control the From address, display name, and Return-Path header that recipients and mail servers see.

Resend

A transactional email API built for developers: add a domain, generate an API key, and paste it into NimblyMail.

SendLayer

A dedicated transactional email service over HTTP API: add a domain, verify it, copy your API key.

Deliverability Health Audit

NimblyMail runs an automated DNS audit of your active sender domain on a daily schedule (and on demand) and surfaces the result on the NimblyMail > Deliverability page and the dashboard. The audit is mailer-aware: required SPF includes and DKIM selectors are sourced from whichever provider you have configured (Gmail, Outlook 365, SES, Resend, etc.), […]