1. Configurate all points of the insterpired app ( SMTP, bounce, cron, max. hourly rate on based of elasticemail account)
2. elasticemail ( account setting, smtp for interspired, SPF, DKIM, TRACKING, , domain and verifier, dns of domain.
3. Chek error log on interspired web app.
[url removed, login to view] all point to have a professional setting.
5. Check limit send daily of domain (dns)