diff --git a/go.sum b/go.sum
index 6b558fe..4f4d6f1 100644
--- a/go.sum
+++ b/go.sum
@@ -82,8 +82,6 @@ github.com/knadh/goyesql/v2 v2.1.2 h1:XQrGiXSyeaRchdJE7odfzmodn3eAyhD5D6SxAkU2+4
 github.com/knadh/goyesql/v2 v2.1.2/go.mod h1:is+wK/XQBukYK3DdKfpJRyDH9U/ZTMyX2u6DFijjRnI=
 github.com/knadh/koanf v1.2.3 h1:2Rkr0YhhYk+4QEOm800Q3Pu0Wi87svTxM6uuEb4WhYw=
 github.com/knadh/koanf v1.2.3/go.mod h1:xpPTwMhsA/aaQLAilyCCqfpEiY1gpa160AiCuWHJUjY=
-github.com/knadh/smtppool v0.3.1 h1:teF/Lp/8wInTq2gTAOnmxPIcX9yPY6o4n57qf0qdJfM=
-github.com/knadh/smtppool v0.3.1/go.mod h1:3DJHouXAgPDBz0kC50HukOsdapYSwIEfJGwuip46oCA=
 github.com/knadh/smtppool v0.4.0 h1:335iXPwZ6katJVhauV4O6e8uPvvPmO6YLrfDQhb6UvE=
 github.com/knadh/smtppool v0.4.0/go.mod h1:3DJHouXAgPDBz0kC50HukOsdapYSwIEfJGwuip46oCA=
 github.com/knadh/stuffbin v1.1.0 h1:f5S5BHzZALjuJEgTIOMC9NidEnBJM7Ze6Lu1GHR/lwU=