Octave
Email Inbox Infra Calculator
Size your cold outbound infrastructure. Domains, inboxes, volume, and contact capacity at a glance.
Starter (2 domains)
Growth (5 domains)
Scale (10 domains)
Enterprise (20 domains)
Configuration
# of Domains
Separate sending domains you own
Inboxes per Domain
Recommended: 5-8
Emails per Day per Inbox
Recommended: 20-30
Sending Days per Month
20 = weekdays only. Above 20 means weekend sends.
Recommended: 20 (weekdays only)
Steps per Sequence
Number of emails each contact receives in a sequence
1 step (single send)
2 steps
3 steps
4 steps
5 steps
6 steps
7 steps
8 steps
Output
25
Total Inboxes
12,500
Emails / Month
4,167
Contacts / Month
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