Report of Independent Registered Public
Accounting Firm

To the Board of Trustees and Shareholders of Natixis
Funds Trust I:

In planning and performing our audits of the financial
statements of Loomis Sayles Multi-Asset Income Fund,
Mirova Global Green Bond Fund, Mirova Global
Sustainable Equity Fund, Mirova International
Sustainable Equity Fund, Natixis Oakmark International
Fund, Natixis U.S. Equity Opportunities Fund, and
Vaughan Nelson Small Cap Value Fund, each a series of
Natixis Funds Trust I (the "Funds") as of and for the year
ended December 31, 2019 in accordance with the
standards of the Public Company Accounting Oversight
Board (United States) (PCAOB), we considered the
Funds' internal control over financial reporting,
including controls over safeguarding securities, as a basis
for designing our auditing procedures for the purpose of
expressing our opinion on the financial statements and to
comply with the requirements of Form N-CEN, but not
for the purpose of expressing an opinion on the
effectiveness of the Funds' internal control over financial
reporting.  Accordingly, we do not express an opinion on
the effectiveness of the Funds' internal control over
financial reporting.

The management of the Funds is responsible for
establishing and maintaining effective internal control
over financial reporting. In fulfilling this responsibility,
estimates and judgments by management are required to
assess the expected benefits and related costs of controls.
A fund's internal control over financial reporting is a
process designed to provide reasonable assurance
regarding the reliability of financial reporting and the
preparation of financial statements for external purposes
in accordance with generally accepted accounting
principles. A fund's internal control over financial
reporting includes those policies and procedures that (1)
pertain to the maintenance of records that, in reasonable
detail, accurately and fairly reflect the transactions and
dispositions of the assets of the fund; (2) provide
reasonable assurance that transactions are recorded as
necessary to permit preparation of financial statements
in accordance with generally accepted accounting
principles, and that receipts and expenditures of the fund
are being made only in accordance with authorizations of
management and trustees of the fund; and (3) provide
reasonable assurance regarding prevention or timely
detection of unauthorized acquisition, use or disposition
of a fund's assets that could have a material effect on the
financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect
misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that
controls may become inadequate because of changes in
conditions, or that the degree of compliance with the
policies or procedures may deteriorate.

A deficiency in internal control over financial reporting
exists when the design or operation of a control does not
allow management or employees, in the normal course of
performing their assigned functions, to prevent or detect
misstatements on a timely basis. A material weakness is a
deficiency, or a combination of deficiencies, in internal
control over financial reporting, such that there is a
reasonable possibility that a material misstatement of the
Funds' annual or interim financial statements will not be
prevented or detected on a timely basis.

Our consideration of the Funds' internal control over
financial reporting was for the limited purpose described
in the first paragraph and would not necessarily disclose
all deficiencies in internal control over financial reporting
that might be material weaknesses under standards
established by the PCAOB. However, we noted no
deficiencies in the Funds' internal control over financial
reporting and its operation, including controls over
safeguarding securities, that we consider to be material
weaknesses as defined above as of December 31, 2019.


This report is intended solely for the information and use
of the Board of Trustees of Natixis Funds Trust I and the
Securities and Exchange Commission and is not intended
to be and should not be used by anyone other than these
specified parties.



PricewaterhouseCoopers LLP
Boston, Massachusetts
February 21, 2020



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