diff --git a/Gemfile b/Gemfile
index 595cbc4f..611f4f4c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -122,3 +122,6 @@ gem "rubyzip", "~> 2.3"
 
 # to solve https://github.com/jwt/ruby-jwt/issues/526
 gem "openssl", "~> 3.1"
+
+# mail 2.8.0 breaks sendmail usage: https://github.com/mikel/mail/issues/1538
+gem "mail", "~> 2.7.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index 79b539bb..5a759c3f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -252,11 +252,8 @@ GEM
     loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.8.0)
+    mail (2.7.1)
       mini_mime (>= 0.1.1)
-      net-imap
-      net-pop
-      net-smtp
     marcel (1.0.2)
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
@@ -573,6 +570,7 @@ DEPENDENCIES
   jwt (~> 2.6)
   letter_opener
   lograge
+  mail (~> 2.7.1)
   mini_magick
   net-imap
   net-pop