KMail/5.3.2 (Linux/4.4.74-18.20-default; KDE/5.26.0; x86_64; ; ) If a received e-Mail has a "To" header field without a colon then, KMail2 hangs for a while and then after a while begins to respond and, doesn't display the received message -- the "Attachments" panel only indicates a data amount indicated by the e-Mail's title. Opening the .local/share/.local-mail.directory/ e-Mail file with a text editor and appending a colon (and a space for the KMail2 clear text to display "To:" in bold) to the "To" fixes the issue. For example, part of a header received from Thunderbird running on a Linux platform before the "To" was changed to "To: ": Subject: Diverses Message-ID: <cf99ba52-2d59-663d-323d-488c8d0a604e@xxx.de> Date: Fri, 28 Jul 2017 11:45:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.1.1 MIME-Version: 1.0 To Content-Type: multipart/mixed; boundary="------------755510B2BE84AB876EF68F1C" Envelope-To: <xxx@yyyy.de> X-UI-Filterresults: notjunk:1;V01:K0:2CPpN5i5SVg=:Qr2nYawPHvMQNUmtncHYdkfO14 97dMSLRGyTwfeqMOsvUibXVLtCZa5ezIYOoms3kdUDdc0v5Qov2BNSOOq52Qj2Mcxx3q+jw4g ZQvdy/iW7KjMOBvO42RerCrbiv9VEAK0OEAr2vaxhPKe9HdBZiPFLz+JICTwoZQCHx+EVfQRr xhE9uH5K0JiTst4gDsfbtQ6casMv+OHH6kAzFRQTN7IAlFGIxTW4CuIbNTNihIJ9MHsFXYxAs HMFQ72fwTLMGvcVCBxxphofB8LbtyCioqjJYNjBeuwbMKUbZsMzvH0T4BdX52g4d3dThHP+l3 Jp2wjVSweC+A0IeHFsk3vqkAzlxJJPXvab+gWBlmEWjxlAuL7jah7z261iCmNqcb9Xmz76vi4 NVCTo1EO35ikmM2NEGCZfAy7I+m20Jd5iS7dC/3XUTVm9evwkY6+016H9J1qBEBXpwytDqUOV 93aiRUE5hXbP5h3+L0mQxWZBLeKccENwaXhkcTGmNOToyY8ws5koehtwlDnCp0qLKrWDUK86/ CDDGstKRToogVh5ZWG4F3VSnvonYXlgPuao2gWZ8qO9ohQIPI9/ohvu2NBRPJjpExA9RMjqtp +28y7fQBCUJkZA1fOOxxl48QwvodbW1HdTbhP7+KZ1R/X/hpqATCS9uiPLFAp5O2xf7GnhzP1 qRZPpmuG0pEYpswkNjddo+hl9ZwF3tihkVHPVnwnQXOVNrp/ktMyBhBKKNKlLMxfnEyGo2E/2 ABrYqBp7bVOjgN4RjwaIEWBokCLM7pox8jgmCvLw3Ranfa2UfYQl6Duo9KP8nfnL+Tb2+N8UN lnwdGmCCxQIzb73DfNanFlGRCYCGJryFPmUsCfaBHyaJvXhLsb1lvENTljADrw1hDU35PDn19 cJIfQCfS6JE8NZEqJLJuHuQpjbnkhKwSNJTdM+k0pd7hMgKOJbC+jakWpriTqwdaKbHMr93aJ Ks1/5gKjC5xvmCJr5snX55XEAeOqhHwNMcLCOF3B7k2DjOApoA5BtaDcU08GWmET8Rp5lv8Go oK/gMhskGyCeTld1ht4OnmfcD/pEjWJdWCP8PrUtQ4phZBtZlvzO1KZ/eA5hwZCiFU+Yg3NVh y3KMBRcI2dzYEXouqHtvWxJ+03VyS2GNkTlJJU5lk7p5mef9lyTqVPCml7JK9k/E1NYQ8m0cn DNmkT5vfPmd/dqpOOYsJxm This is a multi-part message in MIME format. --------------755510B2BE84AB876EF68F1C
Yes, yes, I know: the Mozilla Thunderbird folks should conform to RFC 2822 but, in the case of e-Mails with a suppressed recipient list, they don't . . . -------------------------------------------------------------------- RFC 2822: 2.2. Header Fields Header fields are lines composed of a field name, followed by a colon (":"), followed by a field body, and terminated by CRLF. --------------------------------------------------------------------
With kmail2 5.10.3 this is still an issue … KDE Frameworks: 5.55.0 Qt: 5.9.7
Reported behaviour hasn't been noticed for some years now.