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-rw-r--r--extensions/BMO/Extension.pm4
1 files changed, 3 insertions, 1 deletions
diff --git a/extensions/BMO/Extension.pm b/extensions/BMO/Extension.pm
index 94796ec72..1e24141b4 100644
--- a/extensions/BMO/Extension.pm
+++ b/extensions/BMO/Extension.pm
@@ -1127,7 +1127,9 @@ sub _inject_headers_into_body {
# as_string() doesn't return the updated body for multi-part sub-parts.
$email->parts_set([ $email->subparts ]);
}
- elsif ($email->content_type =~ /^text\/(?:html|plain)/) {
+ elsif (!$email->content_type
+ || $email->content_type =~ /^text\/(?:html|plain)/)
+ {
# text-only email
_replace_placeholder_in_part($email, $replacement);
}