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-rw-r--r--program/lib/Mail/mimePart.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/program/lib/Mail/mimePart.php b/program/lib/Mail/mimePart.php
index a9385d715..bd3047724 100644
--- a/program/lib/Mail/mimePart.php
+++ b/program/lib/Mail/mimePart.php
@@ -397,7 +397,7 @@ class Mail_mimePart {
// RFC 2183/2184/2822:
// value needs encoding if contains non-ASCII chars or is longer than 78 chars
- if (preg_match('#[\x20-\x7E]#', $value)) { // ASCII
+ if (!preg_match('#[^\x20-\x7E]#', $value)) { // ASCII
$quoted = addcslashes($value, '\\"');
if (strlen($name) + strlen($quoted) + 6 <= $maxLength)
return " {$name}=\"{$quoted}\"; ";