Fast Solution to Problem: Encoded subject line shown in default email app in WP8, incompatibility

Encoded subject line shown in default email app in WP8, incompatibility

Looks like this forum is the only way to report any issues with WP8.

This is the screenshot from Windows Phone 8 email client (Windows Phone 8.0.10517.150) with problematic message.

The subject line is shown in encoded form.

Message sender: Mailchimp (, well known Email Service Provider.
Our company uses them for sending out marketing emails and we can not control the formatting.

This message header for "Subject:"
Subject: =?utf-8?Q?=D0=9D=D0=BE=D0=B2=D0=B8=D0=BD=D0=BA=D0=B8=20=D0=B2=D0=B5=D1=81=D0=BD=D1=8B=20=D0=B8=20=D1=81=D0=BF=D0=B5=D1=86=D0=B8=D0=B0=D0=BB=D1=8C=D0=BD=D1=8B=D0=B5=20=D0=BF=D1=80=D0=B5=D0=B4=D0=BB=D0=BE=D0=B6=D0=B5=D0=BD=D0=B8=D1=8F=20=D0=B2=20=D0=9C=D0=95=D0=94=D0=98?=
The encoding is used because it consists of non-latin characters (cyrillic in this case).
As far as I know, such encodings (encoded-words) are defined in RFC2047 ( and others standards related to email.

The problem:
1) ESP industry leader Mailchimp definitely uses incorrect (non standard) encoding.
Here is the citation:
An 'encoded-word' may not be more than 75 characters long, including
'charset', 'encoding', 'encoded-text', and delimiters.
If it is
desirable to encode more text than will fit in an 'encoded-word' of
75 characters, multiple 'encoded-word's (separated by CRLF SPACE) may
be used.
So, if non-latin text is larger than some limit, and generated encoded-word becomes larger than 75 characters, the problem shows itself.

2) In reality, every email service and every email client I have seen, does not enforce the standard strictly, and
accept formally incorrect syntax (single encoded-word larger than 75 characters).
In fact, previous version of Hotmail webmail also had abovementioned problems with this encoding, but that was fixed with launch (Old Hotmail - problem
existed, new Outlook - problem fixed).
Also, the problem does not reveal itself on desktop Outlook client.

My request: Please consider accepting formally incorrect syntax for encoded non-latin fields in email messages.

I will also write to Mailchimp again about this issue (for the third or fourth time).
Previously, I wrote to them about their incompatibility with "old Hotmail" email message parser.

Keys to the Problem Encoded subject line shown in default email app in WP8, incompatibility

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Thank you for posting in the forum.

I would suggest you to contact your email provider once again to have this sorted out as the issue is not related to the phone itself.
If there is anything I can help you with, please feel free to reply back.

Windows Error Reporting - To Fix Encoded subject line shown in default email app in WP8, incompatibility

  1. Go to Start button.
  2. Open Control Panel.
  3. Go to Windows Error Reporting.
  4. Click on System and Maintenance, then click Problem Reports and Solutions.
  5. Next, click Change Settings located on the left side panel of the Problem Reports and Solutions window.
  6. Select an option to configure how you want Windows to look for a solution to your problems. You may allow Windows to do it automatically or ask you every time to check if problem occurs.
  7. Next, click the Advanced settings link.
  8. Select Off to turn off Error Reporting.

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by firefox403error | 2016-10-11 15:42