My signatory uses MailInBlack and cannot receive emails sent from SELL&SIGN ?

My signatory uses MailInBlack and cannot receive emails sent from SELL&SIGN ?

Your signer does not receive the signature email because his mailbox is protected by the MailInBlack tool.
Your signer can manage the list of authorized senders from the MailInBlack tool. Below is a link explaining how to do this in MailInBlack receive emails he must authorize the email address cloud@sellandsign.com or the domain sellandsign.com