Wed 13 Nov 2019 9:33:13 - Mailgun - An email has been not delivered [email func: paypal-log] - 'to' parameter is not a valid address. please check documentation

Array
(
    [mc_gross] => -197.00
    [protection_eligibility] => Eligible
    [payer_id] => E3HZRHC3H8F7A
    [address_street] => Viale Romagna 53
    [payment_date] => 00:33:04 Nov 13, 2019 PST
    [payment_status] => Refunded
    [charset] => windows-1252
    [address_zip] => 20133
    [first_name] => Irene
    [mc_fee] => -6.70
    [address_country_code] => IT
    [address_name] => Irene Sarno
    [notify_version] => 3.9
    [reason_code] => refund
    [custom] => 
    [business] => info@suede.it
    [address_country] => Italy
    [address_city] => Milano
    [verify_sign] => Au1E4XiuH8hfyP0dS0eui.ARstKdAmMUsAvsHrv9zNMmCWYh.QRvV1e2
    [payer_email] => irene.sarno@gmail.com
    [parent_txn_id] => 3C4570965L956005A
    [txn_id] => 9SN99907US833005T
    [payment_type] => instant
    [last_name] => Sarno
    [address_state] => MI
    [receiver_email] => info@suede.it
    [payment_fee] => 
    [shipping_discount] => 0.00
    [receiver_id] => D6GF7JMDS7SSE
    [insurance_amount] => 0.00
    [item_name] => Order#1382
    [discount] => 0.00
    [mc_currency] => EUR
    [item_number] => 1382
    [residence_country] => IT
    [handling_amount] => 0.00
    [shipping_method] => Default
    [transaction_subject] => 
    [payment_gross] => 
    [shipping] => 10.00
    [ipn_track_id] => 94c8ae0dc2d6e
)



Wed 13 Nov 2019 18:02:41 - Mailgun - An email has been not delivered [email func: paypal-log] - 'to' parameter is not a valid address. please check documentation

Array
(
    [mc_gross] => -168.00
    [protection_eligibility] => Eligible
    [payer_id] => GGBFY2ENQKDCY
    [address_street] => via Paolo Giovio 6
    [payment_date] => 09:02:32 Nov 13, 2019 PST
    [payment_status] => Refunded
    [charset] => windows-1252
    [address_zip] => 20144
    [first_name] => Susanna
    [mc_fee] => -5.71
    [address_country_code] => IT
    [address_name] => Susanna Castelli
    [notify_version] => 3.9
    [reason_code] => refund
    [custom] => 
    [business] => info@suede.it
    [address_country] => Italy
    [address_city] => Milano
    [verify_sign] => A.i5IFbq194aETyT66AL5IFfe5G7AJ9CgFY-50AX7UvsrWUfe.8-f2TK
    [payer_email] => susanna.castelli@gmail.com
    [parent_txn_id] => 2NP161630G487905N
    [txn_id] => 5GL14122N29609037
    [payment_type] => instant
    [payer_business_name] => Susanna Castelli
    [last_name] => Castelli
    [address_state] => 
    [receiver_email] => info@suede.it
    [payment_fee] => 
    [shipping_discount] => 0.00
    [receiver_id] => D6GF7JMDS7SSE
    [insurance_amount] => 0.00
    [item_name] => Order#1390
    [discount] => 0.00
    [mc_currency] => EUR
    [item_number] => 1390
    [residence_country] => IT
    [handling_amount] => 0.00
    [shipping_method] => Default
    [transaction_subject] => 
    [payment_gross] => 
    [shipping] => 10.00
    [ipn_track_id] => 5361f2361cc6b
)