🔧

vendor/symfony/mime/Header/AbstractHeader.php

@@ -188,6 +188,20 @@ abstract class AbstractHeader implements HeaderInterface
             $tokens[] = $encodedToken;
         }
 
+        foreach ($tokens as $i => $token) {
+            // whitespace(s) between 2 encoded tokens
+            if (
+                0 < $i
+                && isset($tokens[$i + 1])
+                && preg_match('~^[\t ]+$~', $token)
+                && $this->tokenNeedsEncoding($tokens[$i - 1])
+                && $this->tokenNeedsEncoding($tokens[$i + 1])
+            ) {
+                $tokens[$i - 1] .= $token.$tokens[$i + 1];
+                array_splice($tokens, $i, 2);
+            }
+        }
+
         return $tokens;
     }
 
@@ -237,7 +251,7 @@ abstract class AbstractHeader implements HeaderInterface
     /**
      * Generate a list of all tokens in the final header.
      */
-    protected function toTokens(string $string = null): array
+    protected function toTokens(?string $string = null): array
     {
         $string ??= $this->getBodyAsString();
 

vendor/symfony/mime/Header/Headers.php

@@ -190,7 +190,7 @@ final class Headers
         return array_shift($values);
     }
 
-    public function all(string $name = null): iterable
+    public function all(?string $name = null): iterable
     {
         if (null === $name) {
             foreach ($this->headers as $name => $collection) {

vendor/symfony/mime/Header/ParameterizedHeader.php

@@ -85,7 +85,7 @@ final class ParameterizedHeader extends UnstructuredHeader
      * This doesn't need to be overridden in theory, but it is for implementation
      * reasons to prevent potential breakage of attributes.
      */
-    protected function toTokens(string $string = null): array
+    protected function toTokens(?string $string = null): array
     {
         $tokens = parent::toTokens(parent::getBodyAsString());
 

vendor/symfony/mime/Header/PathHeader.php

@@ -57,6 +57,6 @@ final class PathHeader extends AbstractHeader
 
     public function getBodyAsString(): string
     {
-        return '<'.$this->address->toString().'>';
+        return '<'.$this->address->getEncodedAddress().'>';
     }
 }