If you have spreadsheets of contacts, you can upload them to sequences through importing CSV files. You can import contacts into new and existing sequences. 

If you're importing a CSV file into a new sequence, you can click on the "Import CSV" button once you've added a new sequence. 

To import your CSV file into an existing sequence, select the sequence and then click "Import CSV". 

From there, you can drag and drop your file or click "browse" to upload it. The file must be saved with a .csv extension in order to upload it to your sequence. 

During the file import, you can select which sequence field to map the CSV columns to in Interseller. 

If your CSV file is missing some email addresses, you can toggle the "Lookup Missing Emails" option to locate the missing emails to add them in. Toggling this option on will count towards your lookup credits and can slow down your import, especially if you're importing over a thousand contacts. Once you click "Import CSV", your contacts will import and you should be all set. 

If your CSV file doesn't have any missing emails, you'll bypass the third step for looking up any missing emails and see the finished import.

Note:
If your CSV file only contains email addresses, you can still import the file. There's a 32MB limit for each imported file. 

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