The main problem is with the reply email to many recipients. About 25 emails. Header sections going to long, and email hasn’t “From:” header and others important.
What is the solution ? Maybe - like Thinderbird - add Autocrypt on the very end of headers section ?
Yeah, I know that distribute my public key with every email is VERY big point, but I had little issues with this.
I receive email with 25 recipients. After configuration K9, after check, that I have key in cryptography section, I answered for this email.
I have noticed, return from recipients server with message:
======================
email: host: said:
550-5.7.1 [128.128.128.128 11] Our system has detected that this
message is 550-5.7.1 not RFC 5322 compliant: 550-5.7.1 ‘From’ header is
missing. 550-5.7.1 To reduce the amount of spam sent to Gmail, this message
has been 550-5.7.1 blocked. Please visit 550-5.7.1
550 5.7.1 and
review RFC 5322 specifications for more information. x19si853827ljm.164 -
gsmtp (in reply to end of DATA command)
email: host mx.tlen.pl[193.222.135.150] said: 554 Nie przyjmiemy Twojej wiadomosci poniewaz brakuje nadawcy / We can't accept your message - missing From: (#5.3.0) (in reply to end of DATA command)
===========================
After this I check “Sent” folder and I saw source of this message:
===========================
Return-Path:
Received: from [10.0.33.221] (unknown [10.0.33.221])
(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
(No client certificate requested)
by mmmmmm.rrrrrrrr.com (Postfix) with ESMTPSA id CD20D2A268C;
Wed, 30 Sep 2020 22:01:29 +0200 (CEST)
Date: Wed, 30 Sep 2020 22:01:29 +0200
User-Agent: K-9 Mail for Android
In-Reply-To:
References:
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="----RGLJ5A4M52TJG82D6AX5X1RI9C65WA"
Content-Transfer-Encoding: 7bit
Autocrypt: addr=email; keydata=
mQINBF9zHqkBEACyPZXcHv9DK7+Wcc64lIxT1Oy2dyecWQrX9TC+gn0OLIHU/4SZrsk9QoONA6iv
vm+Z6MEzs6zwXgFMBy7pEyYnhY5LyLpHMTclcFXBceAKUlWvQ4GfiGeWYMlcxRkxQTEUmXb+sGaA
M5cchHgifuNwtzlkWDgL7pZJKxXfJU+/wLRHYblwlg9mp5juHPpyzdqaxTkj5ok/BKhCFTdFGJle
9+rY70T+Qzw21FGG1gEHv4DVd3BgyP2uWU/VXFMAC5OFabMWnupBnbuGf1AIvRIwrAFxsoGCuB+4
JdVw45X/2UAKgr2NUlqbA/GRrTqHYjRgk0WUKPMpKgwcDAoEww0fhCy4Krn/Uc+hZK6uMPK/PO9f
T2A8iL8u0/vqCEJE6bFN44P/j0GPtkEOjaW38f8ZS9vF5ARCT9EZs+ldUe5ueGpPupii8tSd9X5H
…
…
…
HFQlo2vq4RVfWmxPg3LEJ6pJCnpK/yM4l3GF2tmqxzxNtpaQuveF4dlMaP0BeLKK4MonjEOhssG0
Se2Dvn/zMhWRmmhoxMUQ9QnszeTD64x8GF0Yis4CbNZdH8DUNnGTnSs=
Subject: =?UTF-8?Q?Re=3A_Turkusowa_-_answer=C5=BA_z_UM?=
To: email
CC: 25 addressess…
Very nice interface, very good work !