Symptoms
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In the forwarded email message there is excessive "From: SRS" header:
From: [email protected]
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Some mail clients (e.g. Microsoft Outlook or Thunderbird) can display this header in the From field:
Cause
Product issue:
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#PPPM-13296 "Mail messages forwarded from a Plesk server, or from one mail account to another on the same Plesk server no longer includes an unnecessary duplicate “From:” header."
Fixed in:- Plesk Obsidian 23 November 2021 (Linux)
Resolution
Please consider updating your server:
Workaround
If update is not possible for some reason you may try the following
workaround
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Connect to the server via SSH;
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Disable add-from mail handler:
# plesk sbin mail_handlers_control --disable --name add-from --type global --queue before-sendmail
with