diff --git a/config/mail/encoding.ts b/config/mail/encoding.ts
index da01e57..f1a9e8c 100644
--- a/config/mail/encoding.ts
+++ b/config/mail/encoding.ts
@@ -10,7 +10,6 @@ const encoder = new TextEncoder();
  * @returns encoded string
  */
 export function quotedPrintableEncode(data: string, encLB = false) {
-  data.replaceAll("=", "=3D");
 
   if (!encLB) {
     data = data.replaceAll(" \r\n", "=20\r\n").replaceAll(" \n", "=20\n");
@@ -23,7 +22,7 @@ export function quotedPrintableEncode(data: string, encLB = false) {
     if (encodedChar.length === 1) {
       const code = encodedChar[0];
 
-      if (code >= 32 && code <= 126 && code !== 61) return ch;
+      if (code >= 32 && code <= 126 && code !== 61 && code !== 46) return ch;
       if (!encLB && (code === 10 || code === 13)) return ch;
       if (code === 9) return ch;
     }