Intermittent SMTP issue October 13, 2021 05:55PM |
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Re: Intermittent SMTP issue October 13, 2021 06:18PM |
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Re: Intermittent SMTP issue October 13, 2021 06:19PM |
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Re: Intermittent SMTP issue October 13, 2021 07:09PM |
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Re: Intermittent SMTP issue October 13, 2021 07:25PM |
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Re: Intermittent SMTP issue October 13, 2021 07:37PM |
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Re: Intermittent SMTP issue October 14, 2021 03:11AM |
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Re: Intermittent SMTP issue October 16, 2021 11:51AM |
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Re: Intermittent SMTP issue October 16, 2021 12:37PM |
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Argus
Re: Intermittent SMTP issue October 17, 2021 12:18AM |
Re: Intermittent SMTP issue October 17, 2021 08:30AM |
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Re: Intermittent SMTP issue October 17, 2021 08:30AM |
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Re: Intermittent SMTP issue October 17, 2021 08:39AM |
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Re: Intermittent SMTP issue October 17, 2021 10:15PM |
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Re: Intermittent SMTP issue October 17, 2021 10:52PM |
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Re: Intermittent SMTP issue October 19, 2021 04:41PM |
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Re: Intermittent SMTP issue October 20, 2021 11:39AM |
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Re: Intermittent SMTP issue October 20, 2021 11:46AM |
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Re: Intermittent SMTP issue October 20, 2021 12:46PM |
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Re: Intermittent SMTP issue November 05, 2021 02:48AM |
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Quote
Exchange Online ended support for TLS1.0 and TLS1.1 in October 2020.
New submission error speedbump to be introduced
We are fully aware that many customers will not have noticed the multiple Message Center posts and blog posts, and are not aware of clients or devices that are still using TLS1.0 to submit messages. With this in mind, starting in September 2021, we will reject a small percentage of connections that use TLS1.0 for SMTP AUTH. Clients should retry as with any other temporary errors that can occur during submission. Over time we will increase the percentage of rejected connections, causing delays in sending that more and more customers should notice. The error will be:
421 4.7.66 TLS 1.0 and 1.1 are not supported. Please upgrade/update your client to support TLS 1.2. Visit [aka.ms].
Re: Intermittent SMTP issue November 05, 2021 08:16AM |
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Re: Intermittent SMTP issue November 05, 2021 08:24AM |
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Quote
Notes:
•In most cases, the SMTP server to use is the SMTP server of Internet provider (and not the one of email account). For example, if you have Internet access via Orange and a Free email account, you must use the SMTP server of Orange (and not the one of Free).
Re: Intermittent SMTP issue November 05, 2021 08:25AM |
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Re: Intermittent SMTP issue November 05, 2021 12:39PM |
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Quote
PCSoft Tech Support
By default in Windows, emails are sent via the Windows "wininet" module in SSL mode (optionSSL constant) or in STARTTLS mode (emailOptionSécuriséTLS constant).
In this case, it is this Windows layer which performs the negotiation of the TLS protocol used, so it depends on the version of Windows used and its updates.
In this case, you must have at least Windows Vista / Windows 2008 Server to have support for TLS 1.1 and 1.2, and you must have activated these protocols in the settings of the Internet options of the workstation:
[blogs.msdn.microsoft.com]
To be independent of the Windows version and the protocols activated on the machine, since version 23 it is possible to use EmailParameter (emailParameterMode, 1):
[doc.windev.com]
In this case, the functions for managing the emails use an implementation managing the cross-platform internal to the WINDEV / WEBDEV framework. Thus, the management of emails is the same for your Windows, Linux and mobile (Android / iOS) platforms, and TLS 1.1 and TLS 1.2 are managed since version 23.
Re: Intermittent SMTP issue November 05, 2021 12:48PM |
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Re: Intermittent SMTP issue November 05, 2021 03:12PM |
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Re: Intermittent SMTP issue November 24, 2021 08:01AM |
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Re: Intermittent SMTP issue November 24, 2021 10:10AM |
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Re: Intermittent SMTP issue December 21, 2021 10:57AM |
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