What does Please translate this passage as accurate as possible into English and/or Russian for me. mean?

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Dear Sir,

In response to your e-mail, we would like to inform you at the beginning that your previous inquiry has been forwarded and the answer agreed with the technical unit dealing with letters of credit, both documentary and security.
Referring to our previous answer, we want to clarify that the statement "regardless of the actions the Bank would take under the transaction" was not that the reason for the refusal was the direct receipt of a security letter of credit from the bank that provides it. In accordance with the Bank's internal procedures, documentary letters of credit or collateral or guarantees may be accepted for service (even if it would be only an advice) by our Bank, provided that the opening / granting bank is a customer of the Bank and regardless of whether the Bank should receive a letter of credit / guarantee directly from the opening / granting bank or via another bank (e.g. confirming or transferring.) The reservation provided in the previous reply "whether the beneficiary of the stand-by letter of credit is a Bank customer or not" remains valid. Due to the inability to handle the transaction in question, we do not find grounds to provide a price list for services that will not occur.