I got this message from AWS, which is complaining about the TLS version used in the mail handling from Backendless.
Is this something that you are aware of/will upgrade?
Subject: [ACTION REQUIRED] - Update your TLS connections to 1.2 to maintain AWS connectivity [AWS Account: 758166736907] Hello, We have identified TLS 1.0 or TLS 1.1 connections to AWS APIs from your account that must be updated for you to maintain AWS connectivity. Please update your client software as soon as possible to use TLS 1.2 or higher to avoid an availability impact. We recommend considering the time needed to verify your changes in a staging environment before introducing them into production. We will begin deploying updates to the TLS configuration to a minimum of version TLS 1.2 by September 15, 2023, even if you still have connections using these versions. These deployments will complete by no later than December 31, 2023. This update removes the ability to use TLS versions 1.0 and 1.1 with all AWS APIs in all AWS Regions . How can I determine the client(s) I need to update? We have provided the connection details following this messaging to help you pinpoint your client software that is responsible for using TLS 1.0 or TLS 1.1, so you can update it accordingly. We have an AWS re:Post article that details how you can find IP addresses of SMTP Clients behind a NAT gateway . For assistance in identifying your Amazon Simple Email Service (SES) To (sender) From (recipient) email addresses for your connection(s), please contact AWS Support  or your Technical Account Manager.  https://aws.amazon.com/blogs/security/tls-1-2-required-for-aws-endpoints  https://repost.aws/articles/ARevUPGDKvRyant5D1MA7yZg  https://aws.amazon.com/support Please see the following for further details on the TLS 1.0 or TLS 1.1 connections detected from your account to SES using Simple Mail Transfer Protocol (SMTP) to between August 22, 2023 and September 05, 2023. We are unable to provide UserAgent for these connections because it is part of the HTTP protocol, but is not part of SMTP connections. Region | Event | Message ID | Source IP | TLS Version eu-north-1 | SMTP Message|0110018a4f4e49fb-49cc9f76-14df-4e0d-9ca0-8f84f5927723-000000 | 126.96.36.199 | TLSv1 | eu-north-1 | SMTP Message|0110018a3feb1031-8228ee64-c43e-400b-9129-b7466dce9656-000000 | 188.8.131.52 | TLSv1 | eu-north-1 | SMTP Message|0110018a63f0bf1b-15b9eaf2-6641-4130-ab2b-89281f65fd85-000000 | 184.108.40.206 | TLSv1 | eu-north-1 | SMTP Message|0110018a6123f90f-187c900e-01fe-4a10-bd40-13c1eb5cac9a-000000 | 220.127.116.11 | TLSv1 | eu-north-1 | SMTP Message|0110018a4b8738da-a2ab2f0e-9aa5-46a4-81eb-bd23779c323a-000000 | 18.104.22.168 | TLSv1 | eu-north-1 | SMTP Message|0110018a6408e35d-ddd5ff69-b92c-4e5c-b17f-66cbd67e52c1-000000 | 22.214.171.124 | TLSv1 | eu-north-1 | SMTP Message|0110018a4ccb407a-71ea3d1e-4741-4f65-aa34-8c5f1cc980f7-000000 | 126.96.36.199 | TLSv1 | eu-north-1 | SMTP Message|0110018a41cb9fa5-19b91abf-ccca-4542-9483-7b56b32df648-000000 | 188.8.131.52 | TLSv1 | eu-north-1 | SMTP Message|0110018a5fb4b6ae-334b1822-d9c2-4fa6-83a4-66cca20c9b30-000000 | 184.108.40.206 | TLSv1 | eu-north-1 | SMTP Message|0110018a50134367-23c86c53-d991-4758-864b-dd8ac165dce3-000000 | 220.127.116.11 | TLSv1 | eu-north-1 | SMTP Message|0110018a4bfcf1c6-138d54b6-cd20-4154-9491-a1d0fad15b3b-000000 | 18.104.22.168 | TLSv1 | eu-north-1 | SMTP Message|0110018a6418c16c-c617da2f-a8a7-4b69-93f3-3403dedec180-000000 | 22.214.171.124 | TLSv1 | Sincerely, Amazon Web Services