Along with the comments above, a few other things I’d consider:
If you have new reps, don’t have them jump straight into external outbound at full volume. Give the mailbox a little time to warm up first.
Start with internal messages that are likely to get replies. Something simple like, “I’m new and would love to set up time to connect,” plus 1-2 relevant questions works well.
After about a week, start very slowly with external emails. I’d also flag IT so they can watch for any early signs from Outlook or Google that the user or domain is getting flagged.
For the first day, I’d keep it around 5-10 external emails, spread throughout the day. Ideally, start with messages that are more likely to get responses. In the past, webinar recording follow-ups or “Do you have any questions?” emails have worked well.
From there, add volume slowly. For the rest of week one, I’d only increase by a few external emails per day and continue spacing them out. Don’t send them all at once.
During week two, you can gradually increase volume, but I’d still keep it measured and watch engagement closely. The more personalized and reply-driven those early emails are, the better.
By weeks three and four, most mailboxes can usually handle a higher outbound volume. Even then, continue spreading sends throughout the day across all reps. Consistent sending behavior is just as important as the total volume.
Also watch your link-to-text ratio. For first-touch outreach, I’d keep links minimal and avoid loading the email with multiple CTAs or tracked links.
