Denial of service attack for GMS Mail v3.

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At the SMTP protocol stage, it is possible to enter an email address whose
domain name and user name, combined, exceed 255 characters. This causes
a fatal exception in the SMTP thread (which is later recovered). By
repeatidly sending the a message with this address, all threads may be
in recovery mode which prevents the server accepting more email.


There are two possible solutions to this problem:

  1. Upgrade to version 4 of GMS Mail.
  2. Upgrade to version 3.03E from our FTP site.

Keywords:denial service attack

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