diff --git a/mozilla/mailnews/extensions/smime/resources/locale/en-US/am-smime.properties b/mozilla/mailnews/extensions/smime/resources/locale/en-US/am-smime.properties
index 87ee508081e..3e5f9df5077 100644
--- a/mozilla/mailnews/extensions/smime/resources/locale/en-US/am-smime.properties
+++ b/mozilla/mailnews/extensions/smime/resources/locale/en-US/am-smime.properties
@@ -1,8 +1,9 @@
 ## S/MIME error strings.
-NoSenderSigningCert=You requested to digitally sign this message, but the application failed to find the signing certificate you specified in your Mail/News account preferences or the certificate has expired.
-NoSenderEncryptionCert=You requested to encrypt this message, but the application failed to find the encryption certificate you specified in your Mail/News account preferences or the certificate has expired.
-MissingRecipientEncryptionCert=You requested to encrypt this message, but the application failed to find an encryption cert for %S.
-SignNoSenderEncryptionCert=You requested to sign this message, but the application failed to find an encryption cert to include in the signed message or the certificate has expired.
+## Note to localization: %S is a placeholder
+NoSenderSigningCert=You specified that this message should be digitally signed, but the application either failed to find the signing certificate specified in your Mail & Newsgroup Account Settings, or the certificate has expired.
+NoSenderEncryptionCert=You specified encryption for this message, but the application either failed to find the encryption certificate specified in your Mail & Newsgroup Account Settings, or the certificate has expired.
+MissingRecipientEncryptionCert=You specified encryption for this message, but the application failed to find an encryption certificate for %S.
+SignNoSenderEncryptionCert=You specified that this message should be digitally signed, but the application either failed to find an encryption certificate to include in the signed message, or the certificate has expired.
 ErrorCanNotEncrypt=Unable to encrypt message. Please check that you have a valid email certificate for each recipient. Please check that the certificates specified in Mail & Newsgroups Account Settings for this mail account are valid and trusted.
 ErrorCanNotSign=Unable to sign message. Please check that the certificates specified in Mail & Newsgroups Account Settings for this mail account are valid and trusted
 
diff --git a/mozilla/mailnews/extensions/smime/resources/locale/en-US/msgReadSecurityInfo.dtd b/mozilla/mailnews/extensions/smime/resources/locale/en-US/msgReadSecurityInfo.dtd
index b84a6fa246d..37b51a39f32 100644
--- a/mozilla/mailnews/extensions/smime/resources/locale/en-US/msgReadSecurityInfo.dtd
+++ b/mozilla/mailnews/extensions/smime/resources/locale/en-US/msgReadSecurityInfo.dtd
@@ -6,5 +6,5 @@
 
 <!ENTITY signer.name "Signed by:">
 <!ENTITY recipient.name "Encrypted for:">
-<!ENTITY email.address "E-Mail address:">
+<!ENTITY email.address "Email address:">
 <!ENTITY issuer.name "Certificate issued by:">