A sending schedule defines the window during which Prospi is allowed to send emails for your campaign. Outside of that window, sending is paused - even if there are leads in the queue and daily limits have not been reached.

This gives you precise control over when your emails land in prospects inboxes.

Timing is a real factor in cold email performance. An email that arrives at 3 AM gets buried under everything that comes in before the prospect wakes up. An email sent during active working hours has a much better chance of being seen and read.

For B2B outreach, the pattern is consistent: emails sent on weekdays during morning business hours get the highest open and reply rates.

For most B2B campaigns:

Avoid weekends unless you have data showing your specific audience is active then. Most B2B prospects do not monitor their work inbox on weekends.

This is where most people make a mistake. If you are based in London but targeting US companies, sending at your 9 AM means emails arrive at 4 AM in New York. By the time those prospects open their inbox, your email is already buried.

Always set the timezone to match your target audience, not your own location.

For multi-region campaigns (e.g., targeting both US East Coast and UK), consider splitting into separate campaigns per region. Each campaign gets its own timezone and schedule, resulting in better timing for all segments.

You can update the schedule on a campaign that is already running:

Note: Changing the timezone on an active campaign recalculates the sending window immediately. If you shift several hours forward, sending may pause until the new window opens.

Pro tip: Not sure which timezone your leads are in? Scan the top 50 leads to see where companies are headquartered. That usually tells you whether you are dealing with a single region or a mix - and whether you need to split the campaign.