diff --git a/src/calibre/gui2/email.py b/src/calibre/gui2/email.py
index 516bcb531f..d33e3ae379 100644
--- a/src/calibre/gui2/email.py
+++ b/src/calibre/gui2/email.py
@@ -170,12 +170,8 @@ def send_mails(jobnames, callback, attachments, to_s, subjects,
                 # file internal metadata so don't nuke the filename.
                 # https://www.mobileread.com/forums/showthread.php?t=349290
                 aname = f'{uuid4()}.' + aname.rpartition('.')[-1]
-            import random
-
-            from calibre.utils.random_ua import common_english_words, random_english_text
-            words = common_english_words()
-            num_in_subject = random.randrange(3, 9)
-            subject = ' '.join(random.choice(words) for i in range(num_in_subject))
+            from calibre.utils.random_ua import random_english_text
+            subject = random_english_text(min_words_per_sentence=3, max_words_per_sentence=9, max_num_sentences=1).rstrip('.')
             text = random_english_text()
         job = ThreadedJob('email', description, gui_sendmail, (attachment, aname, to,
                 subject, text), {}, callback)
diff --git a/src/calibre/utils/random_ua.py b/src/calibre/utils/random_ua.py
index 082a548525..d9521ab135 100644
--- a/src/calibre/utils/random_ua.py
+++ b/src/calibre/utils/random_ua.py
@@ -23,13 +23,13 @@ def common_english_words():
     return ans
 
 
-def random_english_text():
+def random_english_text(max_num_sentences=3, min_words_per_sentence=8, max_words_per_sentence=41):
     import random
-    num_sentences = random.randrange(1, 4)
+    num_sentences = random.randrange(1, max_num_sentences+1)
     words = common_english_words()
 
     def sentence():
-        num_words = random.randrange(23, 42)
+        num_words = random.randrange(min_words_per_sentence, max_words_per_sentence+1)
         return ' '.join(random.choice(words) for i in range(num_words)).capitalize() + '.'
     return ' '.join(sentence() for i in range(num_sentences))