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Email Authentication for Bulk Senders As someone from the IT Operations team at Vtiger CRM, I’ve seen firsthand how email deliverability can become a major issue. Here is a common problem - if you haven’t authenticated email domains, then your emails get flagged as spam or blocked entirely. This can be frustrating as it may affect your marketing campaigns, messaging, etc. This is a recurring problem reported by many customers who have integrated Vtiger CRM with service providers like Gmail, Yahoo, Microsoft, or Apple iCloud Mail, and send high volumes of email (5,000+ per day). The good news is, we do have a solution: domain authentication. You need to authenticate your domain with the following: - CNAME - CNAME records increase the deliverability
- SPF – Verifies sender IPs
- DKIM – Ensures message integrity
- DMARC – Protects against spoofing
Benefits: By authenticating your sending domain, you can: - Continue sending emails via Vtiger CRM.
- Significantly improve email delivery rates.
- Reduce support issues related to bounced or undelivered emails.
- Prevent spoofing & phishing.
- Protect your brand reputation.
- Build recipient trust.
Note: Starting February 2024 (for Gmail/Yahoo) and May 2025 (for Microsoft), bulk email senders must meet strict authentication requirements—or risk getting blocked, rate-limited, or landing in the spam folder.
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