PostMTA vs SendGrid: Enterprise Email Delivery Compared

PostMTA vs SendGrid: Which Handles Enterprise Email Better?

SendGrid charges $89+/month for 100K emails. PostMTA delivers the same volume for a fraction of the cost — running on your own infrastructure.

Key Differences

Cost at Scale

• SendGrid 100K/month: ~$89/mo
• SendGrid 1M/month: ~$890/mo
• PostMTA: One-time setup + your cloud costs (~$20-50/mo for equivalent)

Control

• SendGrid: You rely on their infrastructure, their limits, their decisions
• PostMTA: You own everything. Full data, full control, no rate caps from third parties

Bounce Handling

• SendGrid: 5-day bounce email address
• PostMTA: Configurable per-list bounce rules, instant suppression

Authentication

• Both support DKIM/SPF/DMARC
• PostMTA lets you run dedicated IPs for sender reputation

When to Choose PostMTA

• Sending 50K+ emails/month
• Need white-label email infrastructure
• Running multiple sender domains
• Managing email for multiple clients (agencies)

When SendGrid Makes Sense

• Low volume (<10K/month)
• No technical team to manage MTA
• Need instant API integrations

PostMTA → Start free trial