diff --git a/various/mail_prefixer.py b/various/mail_prefixer.py
index 14d4386b..2af0b3f7 100644
--- a/various/mail_prefixer.py
+++ b/various/mail_prefixer.py
@@ -7,6 +7,11 @@ Used to distinguish testing emails from production ones."""
 from django.core.mail.backends.smtp import EmailBackend as DjangoSMTPBackend
 from django.conf import settings
 
+def omezovatko_poctu_mailu(maily:list, maximum:int) -> str:
+	if len(maily) <= maximum: return str(maily)
+	# Aspoň zhruba simulujeme tisk pole…
+	return '[' + ", ".join(f"'{mail}'" for mail in maily[:maximum - 1]) + f', … ({len(maily)} e-mailů) ]'
+
 class PrefixingMailBackend(DjangoSMTPBackend):
 	# method _send is not probably meant to be monkey_patched, so we patch send_messages instead.
 	def send_messages(self, messages):
@@ -16,10 +21,13 @@ class PrefixingMailBackend(DjangoSMTPBackend):
 
 			if message.from_email != settings.SERVER_EMAIL:
 				message.subject = prefix + ' ' + message.subject
+				to = omezovatko_poctu_mailu(message.to, 3)
+				cc = omezovatko_poctu_mailu(message.cc, 3)
+				bcc = omezovatko_poctu_mailu(message.bcc, 3)
 				message.body = f"""Bylo by posláno na e-maily:
-	To: {message.to}
-	Cc: {message.cc}
-	Bcc: {message.bcc}
+	To: {to}
+	Cc: {cc}
+	Bcc: {bcc}
 """+ "\n\n" + message.body
 				message.to = settings.TESTOVACI_EMAILOVA_KONFERENCE
 				message.cc = []