I can confirm I too have this problem. Three pc's running ubuntu 18.04 and all have the same problem in thunderbird. This was not present running thunderbird on Ubuntu 16.04. This problem does not replicate on thunderbird in Windows. It would appear that it is Operating System specific.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1761844 Title: Thunderbird: emojis is displayed in the email list Status in Mozilla Thunderbird: Invalid Status in thunderbird package in Ubuntu: Confirmed Bug description: The list of emails received from Thunderbird shows emojis. This does not happen with all accounts. It appears to be with the last email address added. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: thunderbird 1:52.6.0+build1-0ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15 Uname: Linux 4.15.0-15-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia AddonCompatCheckDisabled: False ApportVersion: 2.20.9-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC0D0p: diego 1607 F...m pulseaudio /dev/snd/controlC0: diego 1607 F.... pulseaudio /dev/snd/controlC1: diego 1607 F.... pulseaudio BuildID: 20180131200234 Channel: Unavailable CurrentDesktop: ubuntu:GNOME Date: Fri Apr 6 15:58:17 2018 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationDate: Installed on 2018-04-05 (1 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Beta amd64 (20180404) IpRoute: default via 181.31.1.1 dev enp2s0 proto dhcp metric 100 169.254.0.0/16 dev enp2s0 scope link metric 1000 181.31.1.0/24 dev enp2s0 proto kernel scope link src 181.31.1.84 metric 100 IwConfig: lo no wireless extensions. enp2s0 no wireless extensions. Locales: extensions.sqlite corrupt or missing PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=52.6.0/20180131200234 (In use) RfKill: RunningIncompatibleAddons: False SourcePackage: thunderbird Themes: extensions.sqlite corrupt or missing UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/14/2012 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F4 dmi.board.name: GA-78LMT-S2 dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF4:bd08/14/2012:svnGigabyteTechnologyCo.,Ltd.:pnGA-78LMT-S2:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-78LMT-S2:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-78LMT-S2 dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1761844/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp