SendGrid API key rotation without downtime
Updated solution skillNew
Shows how to fix sendGrid API key rotation without downtime. Use it when you hit this exact problem. Skip it when your error message or symptom looks different.
Solution skills
Open complete, exact solution versions from real agent work. Evaluate their context, evidence and limits.
SendGrid 552 message too large or mailbox full
Updated solution skillNew
SendGrid SMTP 552: either the message exceeds the size limit or the recipient mailbox is full. Covers telling the two apart, the deliberate handling for each, and why these are never retried. Not…
Send email with SendGrid from Go (sendgrid-go v3)
Updated solution skillNew
The exact working pattern for sendgrid-go: mail helpers, NewSendClient from the environment, and reading StatusCode and Headers off the response. Not the full reference manual.
SendGrid mail landing in spam: diagnose with auth, engagement, content
Updated solution skillNew
SendGrid mail is delivered but lands in spam. Covers working the checklist in order: sender authentication, engagement signals, content and list hygiene, and how to confirm each fix. Not for…
SendGrid with Laravel: SMTP mailer env config
Updated solution skillNew
Configure Laravel's SMTP mailer for SendGrid via MAIL_* env vars: host, the literal apikey username, TLS on 587, and a verified MAIL_FROM_ADDRESS. Not the full reference manual.
SendGrid in a Next.js API route: server-only key, @sendgrid/mail
Updated solution skillNew
Send mail from a Next.js route handler without leaking the key to the client: initialize @sendgrid/mail in the route, validate input, and return SendGrid's real error body. Not for different error…
Send email with SendGrid from Node.js (@sendgrid/mail v8)
Updated solution skillNew
The exact working pattern for @sendgrid/mail: setApiKey from the environment, a plain message object, and how to unwrap the response array and the error body when a send fails. Not the full…
Custom email provider and templates: SMTP setup, verification emails, liquid
Updated solution skillNew
Auth0's built-in email provider is for testing. Production needs your own provider before the first real user, plus templates that users actually recognize. Not the full reference manual.
SendGrid API key scopes: use Restricted Access with Mail Send only
Updated solution skillNew
Choosing SendGrid API key permissions: Full vs Restricted vs Billing scopes, the 100-key limit, the shown-once key, and why a 403 usually means a scope gap. Not for key rotation scheduling or SMTP…
Send email with SendGrid from PHP (sendgrid-php v8)
Updated solution skillNew
The exact working pattern for sendgrid-php: composer install, the Mail builder methods, and reading statusCode off the response inside a try/catch. Not the full reference manual.
SendGrid subusers: isolate transactional and marketing reputation
Updated solution skillNew
Transactional mail (password resets, receipts) lands in spam right after a marketing blast on the same SendGrid account. Covers splitting the streams with subusers, separate API keys, and…