For the SFTP delivery method, use the following variables from w_config_custom.inc:
SFTP_URL – the SFTP host name or IP.
SFTP_USER – the user name.
SFTP_PWD – the password. Can be encrypted (use SFTP_PWD_ISENCRYPTED flag with correct value)
SFTP_PWD_ISENCRYPTED - encrypted flag. Possible values are Y/N. The Default is N.
SFTP_INSECURE - flag for insecure connection. IF YES the public/private keys verification is skipped, and only user/password is used. The Default is YES.
SFTP_PRIVATEKEY – private key file path. Can be absolute path and relative to tpe/dynamic/msgcenter/certdir folder.
SFTP_PUBLICKEY - public key file path. Can be absolute path and relative to tpe/dynamic/msgcenter/certdir folder.
SFTP_PRIVATEKEYPASSWORD – private key password. Can be encrypted (use SFTP_PWD_ISENCRYPTED flag with correct value).
SFTP_EXTRACT_LOCATION - location for extract files.