throw an error if the remote is configured for starttls and the server does not have the extension

markgardner · markgardner · commit 32d0206af0e7 · 2022-04-21T11:29:15.000-05:00
diff --git a/smtp.go b/smtp.go
@@ -374,6 +374,8 @@ func SendMail(r *Remote, from string, to []string, msg []byte) error {
 			if err = c.StartTLS(config); err != nil {
 				return err
 			}
+		} else if r.Scheme == "starttls" {
+			return errors.New("starttls: server does not support extension, check remote scheme")
 		}
 	}
 	if r.Auth != nil && c.ext != nil {

Original file line number	Diff line number	Diff line change
`@@ -374,6 +374,8 @@ func SendMail(r *Remote, from string, to []string, msg []byte) error {`
`374`	`374`	`if err = c.StartTLS(config); err != nil {`
`375`	`375`	`return err`
`376`	`376`	`}`
	`377`	`+ } else if r.Scheme == "starttls" {`
	`378`	`+ return errors.New("starttls: server does not support extension, check remote scheme")`
`377`	`379`	`}`
`378`	`380`	`}`
`379`	`381`	`if r.Auth != nil && c.ext != nil {`