FrazzleCRM + Mailgun

Setup, step by step

1. 1.In Mailgun: Sending → Domains → add your domain (a subdomain like mg.yourdomain.com keeps root-domain DNS untouched).
2. 2.Add the DNS records Mailgun shows you — SPF and DKIM are the ones deliverability lives or dies on. Wait for verification.
3. 3.Grab the SMTP credentials from Domain settings → SMTP credentials.
4. 4.In FrazzleCRM: Settings → Credentials → Add SMTP — paste host, port, username, password, and set your From name/email.
5. 5.Send yourself a test from the credential card, then pick this credential on any email step (or set it as the default).

Deliverability in one line: SPF + DKIM on your domain, warm up gradually, and let FrazzleCRM's broken-link watchdog catch dead links before subscribers do.