The following is an excerpt from pages 471 and 472 of Mormon Doctrine, by Bruce R. McConkie:
1. Unconditional or general salvation, that which comes by grace alone without obedience to gospel law, consists in the mere fact of being resurrected. In this sense salvation is synonymous with immortality; it is the inseparable connection of body and spirit so that the resurrected personage lives forever.
This kind of salvation eventually will come to all mankind, excepting only the sons of perdition. In their case, after their resurrection, "they shall return again to their own place" (D. & C. 88:32); after coming forth in immortality and standing before the judgment bar, because they are "filthy still, ... they shall go away into everlasting fire, prepared for them; and their tonnent is as a lake of fire and brimstone, whose flame ascendeth up forever and ever and has no end." (2 Ne. 9:13-16.) They are resurrected but they are not redeemed from the devil. "They shall be as though there had been no redemption made; for they cannot be redeemed according to God's justice; and they cannot die, seeing there is no more corruption." (Alma 12:18.) Thus it is that the Lord "saves all the works of his hands, except those sons of perdition who deny the Son after the Father has revealed him." (D. & C. 76:40-48.) All others are saved from death, hell, the devil, and endless torment. (2 Ne. 9: 18-27.)
But this is not the salvation of righteousness, the salvation which the saints seek. Those who gain only this general or unconditional salvation will still be judged according to their works and receive their places in a terrestrial or a telestial kingdom. They will, therefore, be damned; their eternal progression will be cut short; they will not fill the full measure of their creation, but in eternity will be ministering servants to more worthy persons.2. Conditional or individual salvation, that which comes by grace coupled with gospel obedience, consists in receiving an inheritance in the celestial kingdom of God. This kind of salvation follows faith, repentance, baptism, receipt of the Holy Ghost, and continued righteousness to the end of one's mortal probation. (D. & C. 20:29; 2 Ne. 9:23-24.) All others are damned, for as Amulek said: "How can ye be saved except ye inherit the kingdom of heaven?" Further: Christ "shall come into the world to redeem his people; and he shall take upon him the transgressions of those who believe on his name; and these are they that shall have eternal life, and salvation cometh to none else. Therefore the wicked remain as though (here had been no redemption made, except it be the loosing of the bands of death; for behold, the day Cometh that all shall rise from the dead and stand before God, and be judged according to their works." (Alma 11:37-41.)
Even those in the celestial kingdom, however, who do not go on to exaltation, will have immortality only and not eternal life. Along with those of the telestial and terrestrial worlds they will be "ministering servants, to minister for those who are worthy of a far more, and an exceeding, and an eternal weight of glory." They will live "separately and singly" in an unmarried state "without exaltation, in their saved condition, to all eternity." (D. & C. 132:16-17.)3. Salvation in its true and full meaning is synonymous with exaltation or eternal life and consists in gaining an inheritance in the highest of the three heavens within the celestial kingdom. With few exceptions this is the salvation of which the scriptures speak. It is the salvation which the saints seek. It is of this which the Lord says, "There is no gift greater than the gift of salvation." (D. & C. 6:13.) This full salvation is obtained in and through the continuation of the family unit in eternity, and those who obtain it are gods. (D. & C. 131:1-4; 132.)
Full salvation is attained by virtue of knowledge, truth, righteousness, and all true principles. Many conditions must exist in order to make such salvation available to men. Without the atonement, the gospel, the priesthood, and the sealing power, there would be no salvation. Without continuous revelation, the ministering of angels, the working of miracles, the prevalence of gifts of the spirit, there would be no salvation. If it had not been for Joseph Smith and the restoration, there would be no salvation. There is no salvation outside The Church of Jesus Christ of Latter-day Saints. (Doctrines of Salvation, vol. 2, pp. 1350.)
I've highlighted the portion "If it had not been for Joseph Smith and the restoration, there would be no salvation. There is no salvation outside The Church of Jesus Christ of Latter-day Saints" as it's the most likely to provoke disagreement from Christians outside the LDS faith, although this is my educated guess.
From the perspective of Christians not affiliated with the LDS Church, are there any inconsistencies between the LDS concept of salvation and what the Bible teaches about salvation?
In other words, are there specific doctrines about salvation taught by the Bible that we can be highly confident about (let's label them as X) and specific doctrines about salvation that the LDS Church is highly confident about (let's label them as Y), such that X and Y are mutually exclusive, meaning they cannot both be true simultaneously?