claws-mail send mail failure

[eexcellent]

Claws mail has developed an ssl handshake failure when sending mail to Fastmail.com server. I have checked all the server settings, they are correct.
Ubuntu 14.04.4 LTS
3.19.0-49-lowlatency
claws-mail 3.9.3-1ubuntu1

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: claws-mail 3.9.3-1ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-49.55~14.04.1-lowlatency 3.19.8-ckt12
Uname: Linux 3.19.0-49-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Feb 17 12:05:40 2016
InstallationDate: Installed on 2016-02-10 (6 days ago)
InstallationMedia: Xubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: claws-mail
UpgradeStatus: No upgrade log present (probably fresh install)