Data export to SendPulse
If you want to export data from Bitrix to SendPulse, go to "SendPulse Emails" -> "Export" tab.
Select mailing list in SendPulse for export. Then select data type:
When everything is set - click "Start export".
Data import from SendPulse to Bitrix
If you want to import data from SendPulse to Bitrix, go to "SendPulse Emails" -> "Import" tab.
Select the mailing to list that contents addresses for import.
A new user will be created for each imported address. Tick what to to with such a user: invite to group or department.
If you want to ignore errors - select it.
When everything is set - click "Start import".