Email Webhooks for Reliable Inbound Mail
Build reliable email webhooks with exact signature checks, event-ID deduplication, durable acceptance, safe retries, and worker-based processing.
How to Manage an Email Suppression List
Build one reliable suppression gate for bounces, complaints, and unsubscribes across every email provider and sending path.
Gmail Sending Limits: Daily Caps for Admins and Developers
Understand Gmail sending limits for personal and Workspace accounts, recipient caps, Gmail API quotas, SMTP relay, and safe scaling options.
Domain Verification Email: DNS, DKIM, and DMARC for Developers
Verify an email-sending domain with DNS TXT, DKIM, SPF, and DMARC checks, plus practical troubleshooting and safe key-rotation steps.
SPF, DKIM, and DMARC: A Practical Setup Guide
Set up SPF, DKIM, and DMARC, verify alignment, stay within the SPF lookup limit, and move safely from monitoring to enforcement.
Your agent's mailbox is now a file store
Sendmux is the email API for AI agents. As of today, every agent mailbox also works as file storage for AI agents: files land in the mailbox by email or direct upload, and your agent lists, filters, and reads them on demand. No base64 in the prompt, no second storage service to wire up. A customer
