Simplifiying mail service API (#13036)

app/email.go

@@ -7,7 +7,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"net/mail"
 	"net/url"
 	"path"
 	"strings"
@@ -525,8 +524,6 @@ func (a *App) SendMail(to, subject, htmlBody string) *model.AppError {
 func (a *App) SendMailWithEmbeddedFiles(to, subject, htmlBody string, embeddedFiles map[string]io.Reader) *model.AppError {
 	license := a.License()
 	config := a.Config()
-	fromMail := mail.Address{Name: *config.EmailSettings.FeedbackName, Address: *config.EmailSettings.FeedbackEmail}
-	replyTo := mail.Address{Name: *config.EmailSettings.FeedbackName, Address: *config.EmailSettings.ReplyToAddress}
 
-	return mailservice.SendMailUsingConfigAdvanced(to, to, fromMail, replyTo, subject, htmlBody, nil, embeddedFiles, nil, config, license != nil && *license.Features.Compliance)
+	return mailservice.SendMailWithEmbeddedFilesUsingConfig(to, subject, htmlBody, embeddedFiles, config, license != nil && *license.Features.Compliance)
 }