Troubleshooting Common Issues in TOTO Mail Sender

7 Tips to Optimize Deliverability with TOTO Mail Sender

1. Use a verified sending domain

   • Authenticate your domain with SPF, DKIM, and DMARC to prove messages come from you and reduce spam filtering.

2. Warm up new IPs and domains

   • Start with low sending volumes and gradually increase over 2–4 weeks so mailbox providers build trust.

3. Maintain a clean recipient list

   • Remove hard bounces immediately, regularly suppress inactive addresses (e.g., 90+ days), and validate new signups with double opt-in.

4. Segment and personalize content

   • Send targeted messages based on user behavior and preferences; personalized subject lines and content increase engagement and lower spam complaints.

5. Monitor engagement metrics and act

   • Track open, click, bounce, and complaint rates in TOTO Mail Sender. Pause or re-engage low-activity segments to protect sender reputation.

6. Optimize message content and headers

   • Avoid spammy words, limit images-to-text ratio, include a clear unsubscribe link, and set proper From/Reply-To headers to match your authenticated domain.

7. Use throttling and retry policies

   • Stagger sends across time and implement exponential retry for temporary failures to avoid triggering provider rate limits or blacklists.