Emails from nobody@invalid.invalid

I get emails from nobody@invalid.invalid.
The sender of these e-mails is very important to me and absolutely trusted - this is the online payment operator.


E-mails from other senders are OK - their e-mail address is displayed correctly.
I am using eM-Client version 8.0.3318 (1a4785) but in version 7 it was the same.
If I view these e-mails through the website of my e-mail provider, this sender is correct.

Only eM-Client unnecessarily interferes and changes the sender, so I have trouble seeing him on the list of received emails.
Please help.

I am enclosing an eml of one of such emails, maybe it will help You identify the problem why eM-Client changes the address of this sender.

Received: from (unresolved []:57902)
by ps15 (Ota) with LMTP id CC4E36F
for; Thu, 27 Aug 2020 13:05:35 +0200 (CEST)
Received: from ( [])
by (Onet) with ESMTP id 4BcfyX6xHLz35q05Q
for NUMERUS@OP.PL; Thu, 27 Aug 2020 13:05:08 +0200 (CEST)
Authentication-Results:; dmarc=none (p=none dis=none)
X-Virus-Scanned: by amavisd-new using ClamAV (29)
X-Spam-Flag: NO
X-Spam-Score: 0.446
X-Spam-Status: No, score=0.446 tagged_above=-10 tests=[ALL_TRUSTED=-1,
Received: from ( [])
by (Postfix) with ESMTP id 08FE51C5A4F
for NUMERUS@OP.PL; Thu, 27 Aug 2020 13:05:10 +0200 (CEST)
MIME-Version: 1.0
X-Mailer: Html Mime Mail Class
Content-Type: text/html; charset=“iso-8859-2”
Content-Transfer-Encoding: quoted-printable
Subject: =?iso-8859-2?B?UG90d2llcmR6ZW5pZSB6YW3zd2llbmlhIHogZG5pYSAyMDIwLTA4LTI3IG5yOiAxMDQ3NTI1Nw==?=
Date: Thu, 27 Aug 2020 13:05:09 +0200
X-ONET_PL-MDA-Version: 1.0.25
X-ONET_PL-MDA-Info: 015 13297 CC4E36F 0.479553

Potwierdzenie z=B3o=BFenia zam=F3wienia.

Numer zam=F3wienia: 10475257

05-152 CZOSN=D3W
PIE=D1K=D3W 62

Imi=EA i nazwisko: Filip
Firma: Przedsi=EAbiorstwo Wie= lobran=BFowe WAL Filip
NIP: 191-14-60
Kraj:= Polska
Miejscowo=B6=E6: 66-400 Gorz=F3w Wlkp.
Ulica: Kolog=F3rska, nr domu: 1a, nr lok.:
Telefon: +483= 77872

Dane zakupu:
Data zakupu: 2020-08-27 13:05
Tytu=B3 p=B3atno=B6ci: Program Trans NMT
Opis: zakup klucza
Kwota: 100.00 PLN

---------------------------------------------------------------------------= ---
Wiadomo=B6=E6 wygenerowana automatycznie (id transakcji:635596661)

Przesy=B3amy pozdrowienia | Best regards

Zesp=F3=B3 Przelewy24



PayPro S.A.
60-327 Pozna=F1, ul. Kanclerska 15

tel.: 61 642 93 44, info@prz=
fax: 61 642 90 31, http://www.=

The format of the “From” line looks unusual to me. I suppose that eM Client has trouble interpreting it and then replaces it with nobody@invalid.invalid. I would expect a FROM line to look like this one:

From: Serwis <>

Usually you have the name of the sender, followed by the email address within “<” and “>”.

I don’t know whether it’s up to the sender to format the message correctly or up to the developers to enable eM Client to read this format.:thinking:

Thank you very much Ezrider. You are probably right.
To check it I changed and corrected line FROM in the eml file according to your suggestion.
Then I downloaded the corrected eml file to eM Client - now the sender is displayed correctly.
So, I just don’t know how to ask eM Client programmers to fix this problem :grinning:

If you have a free licence, you can only hope that they will read your message. However, I suppose that it is rather up to the sender to generate a From line that complies with the email message standard (RFC 5322).