Rephrase emailer conflict error messages

server/initializers/checker-after-init.ts

@@ -139,16 +139,16 @@ function checkSecretsConfig () {
 function checkEmailConfig () {
   if (!isEmailEnabled()) {
     if (CONFIG.SIGNUP.ENABLED && CONFIG.SIGNUP.REQUIRES_EMAIL_VERIFICATION) {
-      throw new Error('Emailer is disabled but you require signup email verification.')
+      throw new Error('SMTP is not configured but you require signup email verification.')
     }
 
     if (CONFIG.SIGNUP.ENABLED && CONFIG.SIGNUP.REQUIRES_APPROVAL) {
       // eslint-disable-next-line max-len
-      logger.warn('Emailer is disabled but signup approval is enabled: PeerTube will not be able to send an email to the user upon acceptance/rejection of the registration request')
+      logger.warn('SMTP is not configured but signup approval is enabled: PeerTube will not be able to send an email to the user upon acceptance/rejection of the registration request')
     }
 
     if (CONFIG.CONTACT_FORM.ENABLED) {
-      logger.warn('Emailer is disabled so the contact form will not work.')
+      logger.warn('SMTP is not configured so the contact form will not work.')
     }
   }
 }

server/middlewares/validators/config.ts

@@ -145,7 +145,7 @@ function checkInvalidConfigIfEmailDisabled (customConfig: CustomConfig, res: exp
   if (isEmailEnabled()) return true
 
   if (customConfig.signup.requiresEmailVerification === true) {
-    res.fail({ message: 'Emailer is disabled but you require signup email verification.' })
+    res.fail({ message: 'SMTP is not configured but you require signup email verification.' })
     return false
   }
 

server/middlewares/validators/server.ts

@@ -50,7 +50,7 @@ const contactAdministratorValidator = [
     if (isEmailEnabled() === false) {
       return res.fail({
         status: HttpStatusCode.CONFLICT_409,
-        message: 'Emailer is not enabled on this instance.'
+        message: 'SMTP is not configured on this instance.'
       })
     }