SellerDeck's use of email is very basic, it simply presents a text message to Port25 of the SMTP server and expects the mail software to take it from there. There is no error recovery or notification. Also be aware that the email address used must be recognised by the SMTP server.
SellerDeck uses the address specified in 'Settings | Business Settings | Company/Contact' as the sending address as well as the receiving address, e.g. if the site is www.yoursite.com then address@yoursite.com should be OK, but if you use an address like address@anothersite.com, this may not be accepted.
SellerDeck uses the address specified in 'Settings | Business Settings | Company/Contact' as the sending address as well as the receiving address, e.g. if the site is www.yoursite.com then address@yoursite.com should be OK, but if you use an address like address@anothersite.com, this may not be accepted.