Prompt
I’m frustrated with SendGrid logs being hard to read. What else should I look at?
Latest observation
If SendGrid logs are hard to parse, the main thing to look at is where the failure happens and what signal is actually reliable for your setup.
Here are the best alternatives to check:
1) Your application logs
Look for:
- request/response status from SendGrid
- message IDs returned by the API
- retries or exceptions
- timeouts, rate-limit responses, auth errors
These logs are often easier to make readable than SendGrid’s own event feed.
2) SendGrid Event Webhook
If you’re not already using it, this is usually much better than staring at raw logs.
It can give you structured events like:
- delivered
- bounce
- deferred
- dropped
- spam report
- open/click events
Good for debugging delivery issues because it shows what happened after the send.
3) SendGrid suppressions and bounce data
Check:
- invalid recipients
- bounced addresses
- blocked/suppressed recipients
- spam complaints
- unsubscribe status
A lot of “emails not sending” issues are really suppression-list problems.
4) SMTP/API response codes
If you’re sending via API or SMTP, the response often tells you more than the logs:
- 401/403: auth issue
- 429: rate limit
- 400/422: payload/content problem
- 5xx: SendGrid-side or transient delivery issue
5) Email headers
For a specific message, inspect headers:
Message-IDX-Message-IDX-SG-*headers- delivery path / authentication results
These can help correlate a message across your app, SendGrid, and the recipient inbox.
6) Domain authentication setup
If deliverability is the issue, check:
- SPF
- DKIM
- DMARC
- branded link tracking
- sender domain alignment
Bad auth setup can cause messages to land in spam or be rejected.
7) Recipient mailbox-side clues
Sometimes the issue is on Gmail/Outlook/Yahoo side:
- spam folder placement
- junk/quarantine policies
- corporate mail gateway rejection
- user-level filtering rules
8) Monitoring dashboards or structured logging
If logs are messy, consider adding:
- JSON logs
- correlation IDs
- message IDs in every send attempt
- dashboards for bounce/delivery rates
That usually makes troubleshooting much easier than using raw provider logs.
If you want, I can help you build a simple troubleshooting checklist for SendGrid issues, or help you design a clean logging format for your app.