Sending Limits & Retry Policy
Understand email provider limits, Laneful's retry policies, and how to plan your email volume to avoid delivery delays.
All email providers have rate limits
Automatic retry for failed deliveries
On this page
Overview
Whether you're using Relay Lanes or IP Lanes, sending limits affect how quickly your emails can be delivered. Laneful automatically handles retries and queueing, but understanding the limits helps you plan better.
How Laneful Handles Limits
Automatic Queueing: When a provider hits its limit, Laneful queues your emails and sends them as capacity becomes available.
Smart Retry: If any SMTP relay rejects messages due to rate limits or temporary errors, Laneful retries delivery for up to 3 days.
Failover: In tracks with multiple lanes, traffic automatically shifts to available lanes when others reach capacity.
Provider-Specific Limits
Each email provider has different limits. Here's what you need to know:
Gmail Limits
Personal Gmail
- • 500 emails per day
- • Resets at midnight Pacific Time
- • Includes all emails sent from account
- • Temporary suspensions possible if exceeded
Google Workspace
- • 2,000 emails per day
- • Higher limits available with SMTP Relay
- • Better reputation and deliverability
- • More suitable for business use
SendGrid Limits
Note about Other Providers
- • Each provider has different limits
- • Laneful charges $5/month for any relay lane
- • Provider fees are separate and additional
Paid Plans
- • 40K+ emails per month
- • Rate limits based on plan
- • Enterprise plans available
AWS SES Limits
Sandbox Mode
- • 200 emails per 24 hours
- • 1 email per second
- • Only verified emails
- • Must request production access
Production Mode
- • Starts at 200 emails/day
- • Automatically increases with good reputation
- • Can reach millions per day
- • Very cost-effective at scale
IP Lane Limits
New IP Addresses: Start with low limits (50-100 emails/day) and gradually increase based on reputation signals. Laneful's AI handles this automatically.
Warmed IP Addresses: Can handle millions of emails per month with up to 20 concurrent connections to ISPs.
ISP-Specific Limits: Each ISP (Gmail, Outlook, Yahoo) has different acceptance rates and connection limits.
Laneful's Retry Policy
When emails can't be delivered immediately, Laneful automatically retries using an intelligent backoff strategy.
How Retries Work
Initial Attempt
Email is sent to the provider's SMTP server immediately.
Rejection/Error
Provider rejects due to rate limits, temporary errors, or quota exceeded.
Intelligent Retry
Laneful queues the email and retries with exponential backoff for up to 3 days.
Retry Schedule
What Triggers Retries
Permanent Failures (No Retry)
Some errors are permanent and won't be retried:
Planning Your Email Volume
Use these guidelines to plan your email sending and avoid delays:
Gmail Volume Planning
Personal Gmail (500/day)
- • Max 15,000 emails/month
- • Best for: Small newsletters, transactional emails
- • Consider spreading sends throughout the day
Google Workspace (2,000/day)
- • Max 60,000 emails/month
- • Better for: Medium businesses, regular campaigns
- • Can handle burst sending better
Scaling Recommendations
Under 10K emails/month: Personal Gmail is sufficient. Perfect for startups and small applications.
10K+ emails/month: Consider IP Lanes when Gmail's daily limits become restrictive or you need reputation isolation.
High volume or mission-critical: IP Lanes provide unlimited capacity and full control over your sender reputation.
Campaign Timing Strategies
Spread Throughout Day
- • Avoid hitting daily limits quickly
- • Better for provider reputation
- • Allows for urgent emails later
Schedule Large Campaigns
- • Split large lists across multiple days
- • Use Laneful's scheduling features
- • Monitor delivery rates and adjust
Monitoring & Alerts
Laneful provides tools to monitor your sending limits and delivery status:
Dashboard Metrics
Automatic Alerts
AI Agent Insights
Laneful's AI agent continuously monitors your sending patterns and provides proactive recommendations:
Best Practices
Follow these practices to optimize your email delivery within provider limits:
✓ Do
- • Monitor your sending patterns and adjust campaigns
- • Use scheduling to spread large campaigns over time
- • Set up alerts for rate limit warnings
- • Test with small volumes before scaling up
- • Keep track of daily/monthly usage across all channels
- • Plan for growth with appropriate lane types
✗ Don't
- • Send all emails at once without considering limits
- • Ignore rate limit warnings or queue buildups
- • Assume provider limits won't affect your use case
- • Mix high-priority transactional with bulk marketing
- • Forget about limits when planning campaigns
- • Use personal Gmail accounts for business-critical emails
Ready to Optimize Your Sending?
Understanding limits is just the first step. Learn how to configure your lanes and implement best practices for reliable email delivery.