Following reports from a user that they were unable to send eMail from their Apple Mail after our recent upgrades to the eMail security, we have been temporarily obliged to significantly lower the levels of the eMail security and Ciphers.

After extensive testing, and with the support of one of the cPanel senior engineers, we have established that the problem stems from older versions of Apple Mail not supporting the stricter modern security protocols and ciphers.

These changes may also impact users of Microsoft Outlook on computers running Windows versions below Windows 10, and some of the earlier Microsoft eMail clients may also experience difficulties.

This cannot be a permanent solution as it puts all of our users at risk, so we shall be returning to the higher security levels as soon as we have been advised that the clients affected by this issue have successfully deployed alternative eMail systems on their computers that support the new strict protocols and ciphers, or at a time we determine if we do not see the adoption of new eMail software within a reasonable time frame.

We recommend that users employ the webmail interface for their mail on, or use the Thunderbird eMail client that is available from in a wide variety of languages and with versions for Windows, macOS, and Linux.

Our testing of Thunderbird on all the above platforms, even the older ones, showed full compatibility with the strictest security measures.

System Requirements:


Operating Systems

  • Windows XP SP3
  • Windows Server 2003 SP1
  • Windows Server 2003 R2
  • Windows Server 2008
  • Windows Server 2008 R2
  • Windows Vista
  • Windows 7
  • Windows 8
  • Windows 10

Please note that while the 32-bit and 64-bit versions of Windows Vista and Windows 7 can be used to run Thunderbird, only 32-bit builds of Thunderbird are supported at this time.

Note that Thunderbird 52 is the last release to support Windows XP, Windows Server 2003, Windows Server 2003 R2, Windows 2008 and Windows Vista.

  • Pentium 4 or newer processor that supports SSE2
  • 1GB RAM
  • 200 MB hard drive space


Operating Systems

  • Mac OS X 10.9
  • Mac OS X 10.10
  • Mac OS X 10.11
  • Mac OS X 10.12
  • Macintosh computer with an Intel x86 processor
  • 512 MB RAM
  • 200 MB hard drive space

Wednesday, January 24, 2018

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