Which version of SDK are you using? We do have the function "receive_smtp_reply" in smtp.c under email app in the WICED IDE 3.4.0 .
you might wanna check that out.
Sending you an invite to download WICKED 3.4.0 early version. Please follow the link to download the latest version.
I was using 3.3.1 SDK. It also had "receive_smtp_reply" in smtp.c. However, for receiving emails, we need to use pop3 implementation.
I am trying to do that on my end, but it seems very involved. Any help would be highly appreciated.