diff --git a/auth.go b/auth.go
index d30a154..f1dad86 100644
--- a/auth.go
+++ b/auth.go
@@ -29,9 +29,20 @@ const (
 	// https://developers.google.com/gmail/imap/xoauth2-protocol
 	SMTPAuthXOAUTH2 SMTPAuthType = "XOAUTH2"
 
-	SMTPAuthSCRAMSHA1       SMTPAuthType = "SCRAM-SHA-1"
-	SMTPAuthSCRAMSHA1PLUS   SMTPAuthType = "SCRAM-SHA-1-PLUS"
-	SMTPAuthSCRAMSHA256     SMTPAuthType = "SCRAM-SHA-256"
+	// SMTPAuthSCRAMSHA1 represents the SCRAM-SHA-1 SMTP authentication mechanism
+	// https://datatracker.ietf.org/doc/html/rfc5802
+	SMTPAuthSCRAMSHA1 SMTPAuthType = "SCRAM-SHA-1"
+
+	// SMTPAuthSCRAMSHA1PLUS represents the "SCRAM-SHA-1-PLUS" authentication mechanism for SMTP.
+	// https://datatracker.ietf.org/doc/html/rfc5802
+	SMTPAuthSCRAMSHA1PLUS SMTPAuthType = "SCRAM-SHA-1-PLUS"
+
+	// SMTPAuthSCRAMSHA256 represents the SCRAM-SHA-256 authentication mechanism for SMTP.
+	// https://datatracker.ietf.org/doc/html/rfc7677
+	SMTPAuthSCRAMSHA256 SMTPAuthType = "SCRAM-SHA-256"
+
+	// SMTPAuthSCRAMSHA256PLUS represents the "SCRAM-SHA-256-PLUS" SMTP AUTH type.
+	// https://datatracker.ietf.org/doc/html/rfc7677
 	SMTPAuthSCRAMSHA256PLUS SMTPAuthType = "SCRAM-SHA-256-PLUS"
 )
 
@@ -49,15 +60,15 @@ var (
 	// ErrXOauth2AuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
 	ErrXOauth2AuthNotSupported = errors.New("server does not support SMTP AUTH type: XOAUTH2")
 
-	// ErrSCRAMSHA1AuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
+	// ErrSCRAMSHA1AuthNotSupported should be used if the target server does not support the "SCRAM-SHA-1" schema
 	ErrSCRAMSHA1AuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-1")
 
-	// ErrSCRAMSHA1PLUSAuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
+	// ErrSCRAMSHA1PLUSAuthNotSupported should be used if the target server does not support the "SCRAM-SHA-1-PLUS" schema
 	ErrSCRAMSHA1PLUSAuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-1-PLUS")
 
-	// ErrSCRAMSHA256AuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
+	// ErrSCRAMSHA256AuthNotSupported should be used if the target server does not support the "SCRAM-SHA-256" schema
 	ErrSCRAMSHA256AuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-256")
 
-	// ErrSCRAMSHA256PLUSAuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
+	// ErrSCRAMSHA256PLUSAuthNotSupported should be used if the target server does not support the "SCRAM-SHA-256-PLUS" schema
 	ErrSCRAMSHA256PLUSAuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-256-PLUS")
 )