Support » Plugin: Mailster AmazonSES Integration » Amazon SES API Signature Version 4

  • Resolved contentmeister


    I received this email from Amazon SES and was wondering how that will affect Mailster’s SES plugin:

    Amazon Web Services currently supports Amazon SES API requests that are signed using Signature Version 3 and Signature Version 4 processes. Signature Version 4 further enhances the security around authentication and authorization of Amazon SES customers by using a signing key instead of your secret access key. To improve the security for our customers, beginning October 1, 2020, Amazon Signature Version 3 will be turned off (deprecated) in Amazon SES in favor of Signature Version 4.

    Amazon SES customers who are still using Signature Version 3 must migrate to Signature Version 4 by September 30, 2020. After that, Amazon SES will only accept requests that are signed using Signature Version 4.

Viewing 6 replies - 1 through 6 (of 6 total)
  • Robert


    Thank you “contentmeister”

    I’ve received the same message and I have the same question : “How that will affect Mailster’s SES plugin?

    About this subject, we have a reference from Amazon at

    Thank you




    I’ve received the same email too and I am asking myself the same question.
    Thank you.

    Plugin Author EverPress


    Hi all!

    Thanks for bringing this to our attention! We are aware of this change and working on an update to the plugin!

    Best Regards

    Any updates? I have received the same email about 2 months ago and again last week from Amazon…

    Julian M.


    Do you have any updates or tentative date when this will be applied?

    Plugin Author EverPress


    This plugin uses version 4 of the signature since 2.4 so please update if you haven’t already.


Viewing 6 replies - 1 through 6 (of 6 total)
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