Exporting mailboxes from Inboxlee: CSV format and field reference
For teams not using a native integration. Full CSV schema and import instructions for the major sending tools.
Rejwan Nirob·Jan 22, 2026·4 min readCSV export is the universal escape hatch for sending tools without a native API integration. Inboxlee exports a stable CSV format compatible with every major cold-email tool.
Field reference
- email - full mailbox address
- first_name - defaults to the local part if not set
- last_name - optional
- imap_host, imap_port, imap_username, imap_password - for inbound retrieval
- smtp_host, smtp_port, smtp_username, smtp_password - for outbound sending
- daily_limit - recommended sending cap (10 to 20 for cold outbound, well below the platform ceiling)
- warmup_day - current day in the warmup schedule
Where to export
Inboxlee dashboard → Mailboxes → Export. Filter by status (Live), domain, or tag. Click Export CSV. The file downloads with all live mailboxes in the standard format.
Importing to common tools
Smartlead → Email Accounts → Bulk Import. Instantly → Email Accounts → CSV Upload. Lemlist → Email Accounts → Import. Apollo → Email Settings → Connect Mailbox → CSV. The format is identical across all four.
For automatic continuous sync (mailboxes stay updated as you provision new ones), use the API integration. CSV is for one-off bulk imports or sending tools without API support.
Frequently asked
How do I export Inboxlee mailboxes to CSV?
Inboxlee dashboard → Mailboxes → Export. Filter by status (Live), domain, or tag if you only want a subset. Click Export CSV. The file downloads with all matching mailboxes in a standard format compatible with Smartlead, Instantly, Lemlist, and Apollo.
What fields are included in the Inboxlee mailbox CSV export?
Email address, first name, last name (optional), IMAP host/port/username/password (for inbound retrieval), SMTP host/port/username/password (for outbound sending), recommended daily limit (10-20 for cold outbound), and current warmup day. Format is identical across all major sending tools.
Should I use CSV export or API sync for connecting Inboxlee to my sender?
API sync if available. API sync keeps mailboxes updated automatically as you provision new ones - no manual CSV re-export needed. CSV is for one-off bulk imports or sending tools without API support. Smartlead, Instantly, Lemlist, and Apollo all support API sync; CSV is the universal fallback.
How do I import the Inboxlee CSV into Smartlead, Instantly, Lemlist, or Apollo?
Smartlead → Email Accounts → Bulk Import. Instantly → Email Accounts → CSV Upload. Lemlist → Email Accounts → Import. Apollo → Email Settings → Connect Mailbox → CSV. The Inboxlee export uses the standard cold-email-tool CSV schema, so the import is identical across all four.