The FROM address is replaced by the forwarder email address when the Fix incorrectly set sender for outgoing mail option is enabled

Ivan Kamnev

Updated January 13, 2026 19:01

kb: bug kb: fixed Plesk Obsidian for Linux ABT: Group A

Applicable to:

The Fix incorrectly set sender for outgoing mail option is enabled in Plesk > Tools & Settings > Mail Server Settings.
The Switch on mail forwarding option is enabled in Domains > example.com > Email Addresses > johndoe@example.com > Forwarding and janedoe@domain.tld email address is added into Forward incoming messages to the following email address field:
Click on the screenshot below to expand
In an attempt to send an email from original_sender@example.com to johndoe@example.com address, in the email which forwards to janedoe@domain.tld account, the FROM address is replaced by the forwarder email address(which is johndoe@example.com).
The following message can be found in /var/log/maillog file:
CONFIG_TEXT: plesk sendmail[5334]: handlers_stderr: INFO:__main__:Address in header 'From: Plesk Test <original_sender@example.com>' was changed to 'johndoe@example.com'

Product issue:

#PPPM-12293 "Sending an email from a mailbox associated with domain A to a mailbox associated with domain B that is hosted in Plesk with “Fix incorrectly set sender for outgoing mail” enabled in “Tools & Settings” > “Mail Server Settings” and forwards mail to a mailbox associated with domain C no longer changes the “From” header as if the email originated from domain B and not domain A."
Fixed in:
- Plesk Obsidian 27 October 2020 (Linux)

Please consider updating your server:

If update is not possible for some reason you may try the following

workaround

Until the bug will be fixed apply the workaround below: