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Updated README

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1 parent 92ea2ea commit 1f93264474c6ec669e6dbb1c402ea02dd3814e54 Andris Reinman committed Apr 3, 2012
Showing with 7 additions and 1 deletion.
  1. +7 −1 README.md
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@@ -263,7 +263,7 @@ Where `dkimOptions` includes necessary options for signing
All messages transmitted through this transport objects are from now on DKIM signed.
-**NB!** Currently if several header fields with the same name exists, only the last one (the one in the bottom) is signed.
+Currently if several header fields with the same name exists, only the last one (the one in the bottom) is signed.
Example:
@@ -279,6 +279,12 @@ Example:
See examples/example_dkim.js for a complete example.
+**NB!** Be careful when using services like Gmail, SES etc. through SMTP
+(SES API is handled by Nodemailer automatically) - these tend to modify some
+headers like Message-Id or Date which invalidates the signature. In this case use
+`headerFieldNames` property to define only fields that won't be changed and leave
+out `Date` or any other unsupported field.
+
### Well known services for SMTP
If you want to use a well known service as the SMTP host, you do not need

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